The Scale goes from 1 to 10 with 2-3 being an average mouse. This speed is fine for game menus, applications etc, however in game you want it cranked to a 10 for the speed you can get out of this mouse. For example in Tribes, I play with the B2000 at 10 but when I hit an inventory I quickly put it back to 2 to allow for more accurate weapon choices, then back to 10 and I m in game again. A fancy name for increased precision and speed. Not only can I move faster, it takes less hand movement to do the small things.
Smaller movements mean less fatigue and overall faster movement.
I can whip around to view any part of combat. Increased DPI means an increased situational awareness. It also means less lifting the mouse off of the pad to adjust your aim or position. A 7-foot cord. This is nice as my CPU is on the floor beside my desk and my old mouse was always getting caught.