used actively (almost every evening for several hours) for about 4 years; the coating is rubbed off, peeled off in places (a couple of small non-critical spots), which is, in principle, expected; clicks are loose (also expected); there was an unlocked software (I tried to use it, but it turned out to be nonsense), as a result, I set the sense and scored; I tried to make silent clicks, eventually ruined the mikriki and decided to send the mouse to a well-deserved retirement :) ps played on solid black and colored carpets, the sensor did not fail even once