A confession: I do not use the mouse to play, but to work. I make a lot of programming and interface design, Photoshop, Illustrator ... I need a mouse that responds well. Until now I was using a Logitech mouse provided by my company which had many problems with my office in formica surface; occasionally she sent the pointer wander to the other side of the screen. With the mouse EC Tech is flawless, the pointer follows exactly what I do, and I can change the acceleration at any time with DPI button: great!
A very good mouse I recommend you (if you're right handed)