The carpet is nice, the helmet is really great, the mouse is great at first, but after a few months, I already have problems with the dial that jumps when scrolling, for example on a web page, all 6 or 7 "steps", it goes back a notch or two, it's really frustrating. The skin covering fishing under the thumb was also slightly damaged. If skiing is perfect.
The Windows driver was problematic, sometimes he planted at the start and I could not move the cursor. Finally I uninstalled SteelSeries Engine and mouse is again used correctly. After a few months I reinstalled and I have no problem since.