This is my first liquid cooler and so far I am quite satisfied. It keeps the Ryzen 7 3700X overclocked at 4.3GHz at 50-54 idle and in games with maxed out graphics at 65-68 degrees. At first, I noticed that sometimes there was instability with the RPMs of the fans and pump with huge fluctuations within a few seconds, resulting in it being silent one moment and then going crazy the next. This phenomenon has decreased now, but it can still happen once in a while. The installation was easy. It has nice lighting and the software from NZXT offers many settings with easy handling.

Keeps the 3600x "calm". Very stable temperatures and most importantly, simple and easy installation. As for the build quality, no comments are needed; as soon as you open the box, you know you made a good purchase!!!

* The only negative, and it might be due to the distance of the RAM slot from the CPU slot on the ASUS ROG Strix B450-F Gaming, so I won't deduct a star because I haven't tested it on another motherboard, is that the G.Skill TridentZ RGB 16GB DDR4-3200MHz (F4-3200C16D-16GTZR) couldn't fit in the first slot because the tubes were in the way. Given that I wanted the NZXT logo to be visible normally, otherwise, it could easily be turned around and all the DIMMs could fit comfortably

The liquid cooling is a gem for the computer, it's worth the purchase. Installed on a Ryzen 2700x, under normal use I have 25-27 degrees, under stress 48-55 degrees. Quality construction and with an incredible lighting effect (manageable)

Guys, the liquid cooling is the best you can buy, even the way it screws in makes you realize that the construction is very good. I also know from a friend who has had it for years and it is reliable!!!

BUT be careful because I bought it, installed it at the top of the case, and then the RAM sticks couldn't fit on the motherboard because they were hitting the liquid cooler.
So do some research before you buy it hastily like I did, because a smaller cooler might suit you better for the back or even a larger one for the front!!!

In terms of quality, it is excellent, while aesthetically it is one of the most beautiful on the market. In terms of performance, it is perhaps the top 240mm AIO and comes with a 6-year warranty! Excellent product and choice for those who have a case compatible with a 240mm radiator.
Greek video/review with measurements (of the X62) on AMD Ryzen 7 2700X: https://www.youtube.com/watch?v=TICm_MD8k5E

Silent and easy to install, it is supposed to be one of the best liquid coolers available, and that's why I chose it. How long it will last is a question mark; I hope for the best. I will update the rating if something unexpected happens, like a pump failure or if there is a leak.

EDIT 7/1/2020
So far, it lives up to its reputation, trouble-free, without presenting anything negative, completely satisfied. I will update with new edits along the way if anything comes up. This is my personal opinion for as long as I have it in my possession; go ahead and purchase it without hesitation!!

Παιδιά η υδρόψυξη αξίζει κάθε ευρώ . Αν θέλετε κάποια υδρόψυξη σε αυτά τα χρήματα απλά μην το σκεφτείτε.
Η αντλία είναι πάρα πολύ αθόρυβη
Σε AMD Ryzen 7 2700X στα 4,3Ghz έχω θερμοκρασίες 29 βαθμούς σε idle και full performance 67 βαθμούς.
Tα fans είναι αθόρυβα. Οταν ομως ειναι στο 100% απλα κλείστε τα αυτιά σας, αλλά δουλεύουν αψογά.
Μπορείτε να δείτε το pc build που κάναμε με τη συγκεκριμένη υδρόψυξη στο βίντεο : https://www.youtube.com/watch?v=MpBXa_M-w6U&t=3s

Beautiful construction with silent operation at low to medium RPMs. It cools the 2700x processor quite well, averaging 10°C lower temperature, but that's secondary for me. The most important thing is that it doesn't start to lose its coolant, as mounted horizontally it will also cool the graphics card and the power supply well. Reading the reviews, I saw that it is quite reliable and has not been reported to lose its fluids. Time will tell. Also, for those using AMD processors, removing its factory cooler will 90% uproot the processor as well, so great care is needed to avoid damage and to place it back in its position.

Until 2017 when I bought it, by far the most efficient closed-loop water cooling system on the market. Excellent product, highly recommended.

Outstanding performance, installed on RYZEN 1700X K 2700X, lowering temperatures and achieving better timings.

Dissatisfied with a Corsair i80 water cooler (replaced 2 times under warranty), it finally broke down for the 3rd time, the cooler opened up and we had a leak and complete destruction of the pump.

It comes with a 6-year warranty.