Actually, this is my second Logitech laser mouse, which I just bought a couple weeks ago. The first one lasted only 6 months, and when it went out it was the LMB that simply stopped working. Before I bought this second one I tried the MS cordless laser mouse, but it hurt my wrist and didn't have the extra buttons I've come to rely on, plus it's not rechargeable like the logitech. Now this one works fina all day long no matter what I'm doing with it, but only starts acting up in Poser, and even then not all the time, just occasionally. shrug