Good construction of the watch, quite light compared to its size and reliable GPS measurement. Poor app in terms of the ability to change the interface and the accurate measurement of the pedometer. Subdued light that is difficult to distinguish when running. A good sport watch is characterized by reliable GPS measurement, heart rate monitor, and secondly by its performance as a smart watch. Specifically, the constant heart rate measurement is 15 to 20 beats higher, starting the first kilometer at 180 and skyrocketing to 200 in the stratosphere. The second problem for me, but regarding the smart watch part, is that in order to be notified of a call or message, you need to be within 10 meters of the phone (so you don't need to see it, you just hear it since you'll be nearby). Otherwise, you'll miss the call or message. This is an important parameter as when I work, I can't have my phone with me all the time. I had a watch from an inferior company, not Suunto, and with 399 before discount, I did these things excellently and for less than half the price. In conclusion, I had higher expectations from this company, which were not met.

~Sorry for the lengthy message, guys. I want to provide as comprehensive a picture as possible gradually from the purchase.

I received it yesterday.

The first impression it leaves you with is quite good in terms of construction and quality. It has a fabric strap which I believe is better for sweat as well as leather in terms of allergies. The watch comes with an additional strap inside its packaging, black in color in case someone wants to change it. In the photo, you can see how it fits on my wrist which is 18 centimeters in circumference. In terms of appearance and impressions, it definitely attracts attention as it is not the classic slim small smartwatch. It has a noticeable size that stands out and leaves good impressions.

Yesterday I manually set the altimeter. Today, when I went to work and checked it (I am a surveyor), the elevation difference was about 3 meters compared to my GPS measurements. I will say this here. Having an elevation difference of 3 meters between two measurements at exactly the same point is an issue. The issue ceases to concern even the most skeptical when one measurement comes from a watch costing 350 euros and the other from a GPS designed for recording points with millimeter accuracy. For this reason alone, I will say that the watch's measurement is sufficient and leaves me satisfied.

I will return in the next period to write impressions about GPS, route recording, calories, indoor sports, in canyons where there is no signal at all, in static exercises, etc.

Its connectivity is just fine. It connects directly with iOS devices.

7/11/2023 EDIT

One full month has passed with full use of the watch and I have the following to say:

In terms of functions in measurements, it has its ups & downs and I will explain.

Regarding the altimeter, you can place the watch in an open horizon area (if you are in a populated area or an area with many obstacles like trees, the best is a clearing or the highest point with the fewest obstacles around) to do an auto adjustment of the elevation, it takes 5-10 minutes and the result is OK. Always keep in mind that the ability to adjust the elevation exists manually, so if you know what elevation you are at, you can adjust it that way and you are covered. The good thing is that the compass that the watch follows when recording is correct, so if the altimeter drifts from the start, it will continue to record with roughly the same deviation.
The pedometer is below average. Generally, for accuracy in step measurement, you should get a regular pedometer and not a watch.
The heart rate monitor gives me some numbers but nothing significant. They said it will probably be fixed in the next update.
This is purely personal opinion, if you are not an athlete interested in accurately recording measurements of steps/heart rates, then these measurements are not of great importance. It helped me, for example, in keeping my heart rate steady at 160-165 when I run long distances. I have no higher demands, so I was not dissatisfied with anything.
One of its nice features is that you can create or load routes (GPX/KML file) in case you want to go on an unknown trail either for hiking or mountain biking, etc. It is interesting to note here that now most mountain races on the organizers' pages have GPX files, so you download it, upload it via the app, and do an extensive reading of the race if you want, through the maps of the app itself. Of course, you can have the route visible on the watch with navigation indications. For example, I used it in the Zagori run since it was the first year I tried it and I didn't know the topography of the route at all. In the Suunto app, the map has a 3D function (like in Google Earth) and you can see the terrain's morphology (I am attaching a video).

In terms of measurement accuracy, I checked the watch in flat running, trail running, and hiking. I am impressed with its GPS accuracy even in places where the mobile has no signal at all. It is incredibly precise to the point that looking at the route you took, it has recorded even from which side of the trail you passed. You can also set your measurements in intervals, for example, if you want to close a measurement cycle after a certain distance or time (e.g., every 10 minutes or every kilometer). The features it has are countless (it even has a function for paragliding) so the watch will definitely be tested in other activities over time.

The battery life is about 5-6 days with the heart rate monitor on only during exercise, meaning 5 times a week for about 2 hours. If you leave it permanently on and have sleep tracking and stress recovery functions active, it will definitely consume faster. I keep the latter permanently off. It takes time to charge, but I think this can be solved with a good charger.

What remains from the watch is that it was made for purely athletic activities. It is not the classic customizable smartwatch where you can put any wallpaper you want, etc. If sports are a part of your daily routine, then yes, it is worth getting it. If not, there are cheaper options available. I will return at some point with a more complete picture.

MINI UPDATE 25/11/2023
Barometer.
The region of Epirus today experienced something that experts say happens once every 100 years. While the atmospheric pressure is about 1020 hPa, today we had about 980 hPa with values fluctuating locally. The watch synchronized perfectly with the atmospheric pressure! It will definitely have similar results at high altitudes.

MINI UPDATE 29/08/2024
Almost a year after its purchase.
The most important things I want to mention are three things.
1. Far from the sea. It is written in forums, but if you don't see it for yourself, it doesn't mean anything. I don't know exactly what percentage the altimeter is affected by the barometer and what by the satellites and GPS, but as soon as the watch approaches the coast, the altitude starts to play in crazy ranges (it recorded -135 meters). We are talking about depths where even if you wear a diving suit, you won't reach. Also, swimming in a river, the same exact thing. As soon as the watch is in the water, the barometer goes haywire and records whatever altitude.
2. GPS and route tracking. I mentioned it above, I am extremely satisfied. The only point where it lost the route in the year I have been using it was in the gorge of Mythika. Those who have been to that specific point will understand the reason. Great slope, reflection error, and terrain nestled among tall rocks are likely to affect the GPS, which surprisingly recovered very quickly!
3rd. Altitude recording. Calibration before starting the exercise recording and everything is fine. It loses a bit, as is logical, but it's not something that will leave you dissatisfied. For example, the watch performed very well with route recordings in Tymfi, Smolikas, Grammos, Olympus, and Tzoumerka.

I hope this "sheet" for the review didn't tire you. I wish I won't have to come back again. Safe and enjoyable routes to those who made it this far!

As construction is very good. It is light and comfortable in the hand. I believe it is overrated solely because it has the suunto logo. They gave it to me as a gift brought from abroad, it connected easily with the app and on the computer as well as on the phone, apart from notifications from the phone device it cannot offer any other service, for example to end a call while exercising. The lighting is subtle but the major drawback is the measurements, unless I am doing something wrong. I was hiking up a mountain, I had the suunto on one hand and a samsung smart watche 4 classic on the other to check measurements, the suunto showed but instead of the sami 154 beats, which is logical since I was climbing a steep mountain, the suunto showed sometimes 90, sometimes 70, and whenever it remembered it also showed 154, in the other measurements such as distance, etc. they agreed. I go to the sea and I set the altitude to automatically set it to 10 meters while I am at sea, I manually set it to 0 meters, as soon as it enters the water it shows a value from -400 to -200, whatever that means. If it wasn't a gift, I would regret spending my money on it. Now, if I am not doing something right, then maybe I am unfair to it, but on the other hand, I have worked with several watches and I don't miss the mark so much in the settings?? I don't know. The big show is in the steps, if you shake the watch without walking, it easily shows steps, and other watches I have do it too but with more difficulty. I do not recommend it under any circumstances unless you want a watch that can go into the sea and measure the distance you walked, but other watches do that much more economically.

The watch in question is not a smartwatch. It is a sports watch with some smartwatch features.
On Samsung A70 & Pixel 5a everything works fine.
I got it for the following reasons:
1) Good battery life. I've had it connected to my phone for 10 days and with running for half an hour every day, today it was at 5%. I've done the latest update.
2) Calls, notifications, etc. from the phone all work well, no problems (and in Greek).
3) Excellent build quality. I like the strap on this one, it had the same one as the Traverse Alpha I had for 10 years. The feeling is that it's a watch that will last.
4) I don't feel it on my wrist all day and it's a big watch. Very light.
5) GPS finds me immediately and accurately.
6) Heart rate measurements look okay. Same as the Garmin Instinct Solar that I can compare. I don't know about steps, I don't look at that measurement at all.

The Suunto app is good. The only thing I miss is that I haven't found where I can see historical heart rate data. Otherwise, everything is good.

After 5 months of use, I have come to the following conclusions:
1. It's not worth 500 euros.
2. It has fewer apps compared to other smartwatches.
3. The GPS is autonomous, but it doesn't work like mobile phones. You have to put it in exercise mode by yourself. It doesn't work indoors or in the sea, and it can't be left on permanently as it will drain the battery.
4. The graphics are terrible for a 500 euro watch, and the brightness is also poor compared to Huawei and Samsung.
5. It shows an outdoor temperature of 27°C regardless of the season, and it may be affected by body temperature.
6. It has a sturdy and durable construction and is water-resistant in the sea and pool.
7. The heart rate monitor malfunctions in the sea, showing 215 bpm and freezing.
8. It has sleep tracking like other smartwatches.
9. It records hand movements as steps.
10. The GPS is accurate and doesn't make mistakes.
11. It only has one alarm.
12. It didn't give me an alert during bad weather based on the barometer.
13. The GPS requires the Galileo system to work in the city.
14. The Suunto app on the phone is excellent.
15. I believe the Suunto 7 is more value for money as it has built-in maps, while the 9 does not.
16. It has a good Bluetooth connection with the phone.
17. Overall, for 500 euros, I would expect better graphics with a screen that has more colors, better measurements, and built-in maps with a full GPS like mobile phones. Perhaps it's not possible for a smartwatch, but when you're paying that much, you should get a product that matches the price.

I bought the Suunto for its GPS autonomy, which it and the Garmin have, but not other smartwatches. For 500 euros, I expected built-in maps, which the cheaper Suunto 7 and Samsung Galaxy Watch have.
2. It lags behind Samsung and Huawei in graphics.
3. It has few watch faces and fewer apps compared to other smartwatches.
4. The battery lasts 48 hours with the heart rate monitor and GPS on, not 120.
5. The GPS sometimes doesn't work in the city. I had to use the Galileo system, which I read about on a forum, to fix it.
6. The construction is durable and I assume it's suitable for the sea, as they say, because the sensors on the Samsung I tried broke after swimming.
7. It's more of a sport watch than a smartwatch, but for 500 euros, I would expect both.
8. If you move your hand, it shows that you're taking steps, so it loses accuracy like all smartwatches.
9. You can only set one alarm, while on Samsung, you can set as many as you want.
10. It has Greek characters now, but it didn't before. They fixed it.
11. The heart rate monitor is okay. I'm waiting for the barometer to give alerts for severe weather, as they say.
12. Sleep tracking has issues like all smartwatches.
13. It has very good connectivity with the phone, better than other smartwatches. It shows notifications and doesn't miss messages.
14. The app on the phone is very good and detailed.
15. Upgrades can only be done from a computer, not from the phone.
16. The compass is very good.
17. It doesn't lose a single meter of GPS in open spaces, but struggles in the city.

In short, it's too expensive at 500-600 euros. I would buy it for 300. I made a mistake because I couldn't find it in a store window. I ordered it and then saw it.

I got it as a replacement for the Spartan Ultra Titanium I had before, which was destroyed by water (!!). Essentially, it's the Spartan v2, which is basically the same watch, with the only visible changes being in the buttons and the strap (which is now a standard 24mm). There are some differences in the hardware, mainly GPS, but personally, it seems almost the same to me.

So, the same applies as I wrote for the Spartan: well-made, sturdy, with a plethora of features for sports, definitely not satisfactory as a smartwatch (compared to my Galaxy Watch, it's very, very behind), extremely satisfactory in terms of durability and battery life*, it seems to have better and smoother scrolling/animation, and I think the barometer/altimeter is faster and more accurate (although I need to do some testing).

Disadvantages of this specific one: personally, for me, the aesthetic part (it looks somewhat more....flat than the Spartan), the strap is a bit more...visually noisy than the Spartan and has a more difficult clasp, the buttons have a strange tactile feeling (but I guess it's a matter of getting used to).

*I consider the case with water in the Spartan as 0.1% of Suunto.

Large screen, full features, immediate response to whatever you ask it to do without even thinking about it. I've put it through a lot without seeing the slightest scratch - flaw (without it being the titanium version). Infinite battery life. Instant GPS location without easily losing it in caves, canyons, and other hidden places. The only complaint is the optical heart rate monitor (HR) that shows sudden spikes with incorrect readings for very little effort, such as 209 beats per minute, which is not happening. This mainly occurs during interval training (corrected with an HR belt). In the extended but relatively specific parts where you have a certain pace, it shows correctly. And the permanent problem next to sea level is again incorrect readings, it happens in all of them (I have changed many watches). Everything else is PERFECT!!! Distance, altitude, etc. are excellent!! An incredible watch!! This particular strap helps a lot in running, it literally sticks to the wrist. However, it does not dry easily in winter. A very adventurous watch!! I highly recommend it!!

I am the owner of the watch since October 2018. A long enough period to have a clear picture.

2. In terms of GPS, its measurements are very accurate and you can see this from the application that shows you everything precisely. Additionally, you can choose the degree of accuracy for lower energy consumption. (Download the Suunto app, NOT the Movescount app). With the Suunto app, it pairs immediately, notifications work perfectly, and overall it has a better user environment with more information.

3. WARNING: In notifications, it DOES NOT READ GREEK CHARACTERS, which means that if your contacts are written in Greek characters, it won't show who it is. It just shows a notification. And generally, this applies to anything related to Greek.

4. The menu is quite easy, and especially with the touch screen, it becomes even more user-friendly. Don't expect touch response like mobile phones. Simply, for the functions it has, it does the job well.

5. The HR is relatively good, but it has a slight delay in indications. Generally, the watch needs to be tightly fastened a little above the wrist, as it shakes due to sweat during exercise, so it loses a little momentarily.

6. I should mention here that it is very light, despite its size, and generally you don't realize you're wearing it after a while. However, it stands out a lot in height and requires attention, especially at the beginning until you get used to it. Its construction is really high quality (glass and metal), but if it hits a hard object (e.g. iron or wall), the black color of the metal shows rashes.

7. Its battery (with daily HR turned off) lasts more than 1.5 weeks, given that I exercise 3-4 times a week, for 1 hour each time. For someone who exercises more, meaning that GPS and HR will work more, the battery will drain faster. And of course, with daily HR turned on, the battery will last even less.

8. One last thing that concerns me in everyday use, apart from exercise, is that the altitude indication, while working perfectly at altitudes above 15m-20m approximately, when you get close to 0m (sea level), it does not show correct indications. Sometimes it will also show negative (-3m or even -10m, for example). Maybe it's a small deviation it has and appears near 0.

9. I stayed on some issues that I think many people have questions about before buying. It's good to watch detailed video reviews for its capabilities, the many types of sports it can record, and the information it can provide.

10. Now, as for its appearance, for me, it's perhaps the most impressive of what's currently available. However, everyone has their preferences.

11. In closing, I want to emphasize that it is a sports tool, not just a beautiful accessory, even though it combines both. (I say this for those who would only spend the money because it's beautiful.)