Fast and (too) sensitiveArvosana 4/5
This mouse feels quite light in the hand, and isn't exactly big either. If your previous device was heavier, you'll have to somehow re-adjust your movements. That's ok, though, this kind of things was expected, and it within an hour maximum, it is not an issue anymore.
However, the click button is super sensitive. It's great if you need fast clicks, close to each others, but bear in mind that simply resting your finger on the click button will trigger it. I still have troubles with that once in a while.
khrysenthem