Please don't get it. Rather, educate yourself:
Perfect Mouse Sensitivity. - Overclock.net - Overclocking.net
Also, read this whole thread:
DPI = Sensitivity?! I'm so confused.... - Overclock.net - Overclocking.net
Well some months ago I buy a G5 over a G7 because I was a little worried about some things I heard about problems if you play a lots of games in the PC so I decided to go with the G5. So far so good the mouse is great and beside I have never been a fan of wireless thats one of my main reason to go with the G5.