Summary: After at least 4 years of this same model, the left clipper is sticky or won't work for a few clicks. I need to get a new one, and hope it lasts and works as great as this has. I love using on the flat-dash of my laptop. It works on cardboard and thick rough placemats and most mousepads, but not slick surfaces. I've seen all the complaints, but I have none.
Pros: 4 yrs still works now, Accurate Tracking, Comfortable Design, Easy use on laptop dash, Fast Response, Glides Smoothly, Great Features, Retractable no batteries, Works ok w win 7 too
Cons: After 4yrs getting sticky, Limited Surface Compatibility, Surface sensitive
Summary: I bought this mouse mainly because it was retractible. It lasted about a month and then fell apart into many pieces. While I was using it I was quite unhappy with how it reacted to touch and the size/shape. I have large hands and had a very difficult time using the mouse for more than 10 minutes or so. Overall, a complete waste of money. Went to a discount store an bought one for half the price and have been using it ever since.