I Recently swapped up my battered Razer Diamondback 3g for this little beauty and after doing my research I had decided this is the mouse for me. I play mostly RTS games at the moment but I was an extremely big FPS player ranging from COD - CSS - CS 1.6 etc, and after using for about a week I can solidly say that this mouse gives it everything, excellent tracking, lovely comfort, fits hand very nicely however be warned this is a small mouse and I would not suggest it for palm grip users. I personally use a Claw / Fingertip grip for fastest speed possible, one other thing I would like to add is the weight of this mouse its very light and nimble at some points it feels like its an extension of my arm :)
Highly recommended, to any all round gamer.
PS The LED on the palm section of the mouse is sexy ;)