Demesuré
The mouse is nice, but Corsair's problem is the software. Without the software, the mouse is just a useless gadget.
The software in question takes 1GB to load! It's crazy. And all that for slow, very slow, unreliable software that doesn't always transmit data. And if you have the bad idea of wanting to pgrade the software, you have to become a bearded man to uninstall the software on your own, because it can't uninstall itself. Of course, it's everywhere. So 1 star is a very high price to pay for a €90 mouse! If I may offer Corsair a word of advice, stop recruiting your programmers from Beteshda.