I've been using the mouse for about 2 years. After half a year, the wheel stopped working, as I later found out, this was solved by cleaning (more precisely, the wheel did not break, but when I tried to scroll the page, it twitched and did not turn over). Over time (2 years) the right button cracked. If not for her, then I would have used and used this mouse. Also, over time, the plastic is rubbed. By the way, on my mouse there were no inscriptions on top.