Only at the size I have anything to complain about. I feel that is as a little too small. Mag might also be because I have relatively long fingers.
Since I will use it in conjunction with my laptop and they therefore often transported, that goes with the size of still okay.
Nevertheless, I then ordered the ergonomic mouse by CSL. The Rapoo I'll probably use only for the Lappy.
Unbeatable for the price.