LOL @ this review:
"wow the paint job it's seek,it look awesome and wor awesome too,the on the fly dpi stuff is great and it's fast too the poli feets are smuth like butter so it moves efortless over my mouse pad,the wheel feels caind a hard but it gave you presition,and the weight adjustment is great too,on the sides it's like grippi (like a texture for a better grip), plus the usb cable is long and it's wrap in colth,the best it's not wireless, this is a very unique mouse and for me is the best out there,the only thing its a little bit big just a little but all the mouse to in day are big "
Anyway I have the G5 and like it, very smooth, would prefer that the side to side buttons work in games, which they do not, so unless that is fixed you actually lose a button. I do like it better than the MX518