I have the infamous Microsoft Optical Mouse, red on bottom with gray coverings and dark gray sides. The only thing that is wrong with it is a hair now and then from the cats I have to blow out of the way ;-)
I've had three mice from Logitech, they're the only ones I would not recommend to anyone...looking for a nice smooth and quiet mouse. This one has lasted years now, and still works perfect, though the "Microsoft" label rubbed off from all the use...big loss, huh?
-X