Optical and wireless mouses/mice are the devil, in my ever-so-humble (and always valued) opinion. They look tacky, they don't have wires, and they smell like burning. In all seriousness, I couldn't get mine to operate properly - the arrow just seemed to move around in a rather odd and random fashion before grinding to an irritating and unexpected halt, leaving me knee-deep in unfinished Excel work. Needless to say, I dislike optical mouses/mice.