The magic mouse is certainly painful to move, however it would be interesting to see the actual impact on people's hands from it. Since getting one my behaviour has changed to move the mouse with a few fingers, and basically never move my hand. The sensor is very accurate so you can really crank up the movement in settings. This seems similar ergonomically to a trackball so i wonder if there is similar benefits.
Right, I have my wrist basically fixed on the desk and move the mouse with my fingertips. Only when I go very long distances on a large screen I occasionally lift my hand. Alternatively, I lift the mouse and drop it a few centimeters to the side.
