the model is very good, I have had it for almost 2 years, if not more =) it has never broken, it has not been buggy very reliable and reasonable price so take it Its pros: there are a lot of advantages, an ergonomic mouse, very good for games, and of course for simple work on a computer Different cons: I noticed several shortcomings: it collects dirt very much, although my hands are constantly and there are large gaps between the buttons into which it gets, my hands still sweat, well, I think it’s because of the structure of the skin, someone sweats, someone doesn’t =)