Its a nice mouse (especially when combined with the MagicPrefs software) for general web browsing and stuff.
But for games, it is a no go. As it only has one button, and you have to raise your left click finger in order to click with your right click finger on the right side of the mouse, makes it difficult for games, especially FPS and RTS which I play alot. You cannot, and I must stress this, cannot beat a standard mouse for gaming. My Logitech MX600 is brilliant. Under windows atleast. Under OSX it doesnt move as nice, but atleast it has real buttons which is a must for gaming.