What gave me such a bad immpression about this mouse was the first wireless mouse I ever bought( at the same price of 25) was terrible. This mouse has completely changed the way that I view wireless mice.
Before this mouse I have used one, amazingly bad mouse, and a good ambidextrous mouse; I can say that for sure the ergonomics on this mouse are much better than both of the other miceI have used, despite being in the same general price point (20-30).
Sometiems I feel that the mouse is just a tad too small for my hand; There is the pro fit full size mouse so if you have big hand I would go for that one; Also, if you use the palm grip you should go for t he full size as well.