I bought one less than a year ago, and I am going to have to replace it through my Best Buy warranty. I should have exchanged it right after I bought it.
The first negative thing is the poor battery life. I had Logitech MX Master mouse that would last for days. This thing has to be charged daily. The Qi charging does not work.
Now the LED lights have failed. I have tried every troubleshooting technique I have found her, including multiple rests, and the lights will not stay lit.
I will not buy another Corsair mouse.