I recently bought a Laser wireless mouse from Micro Innovations to replace a wireless optical mouse from Microsoft and I have to say that it beats the hell out of my old optical mouse. It is so very precise and the movement is very rapid, it has excellent response. Course I bought a Laser mouse mat to use it on too, which I am sure helps a lot. But, no matter how long they claim the batteries will last they never last near as long. So, I use rechargabloe batteries in mine. Speaking of which Ray-O-Vac has the new hybrid batteries that are supposed to last even longer when charged than regular rechargables. I haven't tried them, I will in the future.