I bought this mouse because of all the reviews saying it helped alleviate wrist problems from rsi/carpal tunnel and it worked for me. I have frequent ache after long periods on the PC. My father suffers severley from carpel tunnel, confirmed by his doctor/hospital and it does not aggrivate it like a normal mouse does. Thank you 3M! Actually looks much cooler in real life than in the photo and will be a talking point for curious envious visitors who will feel like they are back in the stone ages with their wrist hurting mice. It take a little getting used to, and is very accurate, nice feel and high quality. It's not a joystick where you move the paddle, you move the whole unit which is like a mouse at the bottom. This is great for a gift to the person who has everything too. Excellent.