i use a basic-ish microsoft wireless mouse (it says intellimouse explorer 2.0 on the bottom), gripes about lag be damned. i've never noticed a bit of it. the shape and weight are perfect, the only thing i wish it had was higher sensitivity with one of those toggle switches. and built-in rechargeable batteries with a dock or something, though i only have to give it fresh batteries about every 6 months. but hey, it's like 11 years old. first mouse i ever had, it's been through every computer i've built. pretty damn good considering. oh, the side scroll doesn't work worth a damn, so they could just go ahead and get rid of that.