My contrarian view is that the Magic Mouse _can_ be ergonomic as long as you use to be keyboard-centric and treat the Magic Mouse primarily as an extra-large scroll wheel. Then you'll find the scrolling experience with the Magic Mouse is even better than one with a traditional mouse or a trackpad because you can speed-scroll with any finger, at any angle, and with minimal frictions. I especially enjoy scrolling with the right tip of my ring finger.