Biggest minus: The side keys

Unfortunately, the thumb is just the click can be very easy on the extra-page buttons.
In my opinion, extra buttons on the side may not lie directly on the point where due to human anatomy nunmal resting the thumb pad, but is slightly offset so that the fingers or "rest" can and must constantly be careful nich ... Or you should to make the keys at least somewhat more robust.
It also feels thereby to uncomfortable. The side buttons are totally "huckelig".

Otherwise there were no problems but this terrible implement of the side keys is a no-go for me and I got the mouse immediately sent back.