4th Mouse I try in the last months in search of the best shape for my hand in Mixed use, (FPS competitive - regular gaming and work)

I can say that it fits me 90%, maybe I would have wanted it slightly wider in the areas where I grip it (thumb - ring finger).
The mouse is designed for Claw - pincher claw / fingertip in my hands, which are not the largest (about 17cm/8cm). It sits comfortably in a pincher claw grip and in this grip style, I feel that it needs a lightweight mouse. This particular one weighs 58.5g, which is ideal for my preferences and for this specific size. I would also like to note that the weight is distributed correctly and it is neither front nor back heavy.

The coating is nice and soft, with a "grippy" feel, similar to the recent Zowie mice, but not exactly the same.
Personally, if the mouse doesn't slip, there is no chance that I won't use any type of grips, obviously grips are better.

The main switches of m1/m2 are a bit on the heavier side, I don't know exactly how many grams, but definitely over 65. At first, I was afraid that it would be bad, but I don't see any difference in performance and I like that it is slightly more tactical. However, you can change them (I will come back to this). They are also optical Kailh switches, so there are fewer chances of double clicks and similar issues over time.
The side buttons are fantastic, they are exactly where you need them (at least for my hand and for this specific mouse design). They have almost no pre/post travel, they have a crispy sound and feeling like Huano switches, and they have a pointed shape, not flat, as can be seen in the photo.
The scroll wheel has a soft rubberized feel, nice tactility, and it doesn't make any noise (unlike many Zowie mice) or squeak like many older Razer mice.

Overall, the build quality is top-notch - it reminds me a lot of Zowie, it doesn't bend, the plastic doesn't give in, and nothing rattles inside.

Now, spec-wise, if you want to become the ultimate super powerful Pro gamer and you can't play with anything below an 8k polling rate, go somewhere else.
The mouse has the respectable 3370 sensor, it performs steadily at 1k PR, and it executes this specific setup very well with simple software that doesn't need to run in the background (although it is very lightweight). Whatever settings you make, you can close the software after they are saved on the mouse. (Underneath, you can change the DPI to 4 different presets, it has a colored LED and an indicator for the battery - charging).

I have been using the battery for 3 days and I still have it..., I don't think there is a reason to look for more. A 1k PR mouse doesn't consume much battery, and the only thing you have to do if something goes wrong is to use the Angled cable type C that comes with the package, covered with fabric almost like the ones from Razer, and play with it for half an hour, it charges very quickly.

Finally, to conclude the review, I would like to say that I really like the ability to "modify" it within the warranty period. The parts that can be unscrewed are intentionally loose, meaning the screws, and you can change the switches and possibly the battery if it dies at some point and the mouse is not completely destroyed or if you have smashed it in a rage quit. They sell a ready set with the board and lighter switches that I would like to try, but I can't find them in Greece and the shipping costs from abroad, for example, Germany, are too high. You can put larger Scates there is also a provision for selling them but there are also Aftermarket options.

For the price of 80e it is awesome and I have not found anything currently that comes close to this build quality / price / specs (at least from Greece because there are some options that you will pay shipping to try them and if not ... you will also pay to return / warranties etc)

A quite underrated gaming mouse from Endgame.

"Aggressive" design, curved side panels, and low profile design
Ideal for claw and finger grip. It has Kailh go switches and the click feels a bit heavy and may seem somewhat spammy, but personally I liked it because it has a "full" click.
Very high quality construction, weighs almost 60 grams, has 2 buttons on the left side, the battery lasts about 60 hours, and comes with a USB dongle for wireless connection and a charging cable that bends so as not to be bothersome if you want to charge it and use it at the same time.
Also, the screws on the bottom are accessible, in case you want to change the switches with some other endgear ones to customize it to your liking.
My verdict is that it is worth its money and more.

Having used all the Endgame Gear mice up until now, I can say that the OP1we belongs to the same category as the rest. It is a flagship performance mouse, with a unique shape, competitive features, beautiful coating, nice click feeling, and finally, an affordable price for a high-performance wireless mouse, with an integrated battery, charging with a Type C cable which does not bother at all during use if you want to charge while playing.

It is relatively small, so those of you with large palms, do not choose it unless you want a fingertip grip mouse.

It is ideal for fingertip and claw grip. It has a "hump" and not a central height, to fit comfortably in a claw grip. Also, the sides are relatively curved for the fingers to sit comfortably.

It comes with Kailh GO Optical switches, TTC Silver wheel encoder, weighs only 58 grams, has no holes, comes with 100% high-quality and thick PTFE mouse feet.

The optical sensor it uses is the PAW3370 by PIXART. It is a relatively budget sensor that loses compared to those of the "big" ones in the market like the one used by Razer, but only on paper. In real-world performance in everyday use, no one will notice the difference.

The two side buttons are in a convenient position, with a nice click, and the only thing I would change about them is their sound. I would prefer it to be less sharp, although it is not so much that it bothers me during use.

The mouse software is very simple, with all the necessary settings and without any problems so far with any Endgame mouse.

Finally, the battery lasts about 60 hours at 1000Hz polling rate and charges relatively quickly.
I definitely recommend it as a mouse.