Summary: I use both the Expert Mouse with my Windows machine at work, and the Turbo Mouse with my Mac at home. I love them both. I have "wrist issues" after using a computer at work for almost 20 years now, and can no longer use a regular mouse for very long. I love these trackball alternatives.
Pros: could conform a little more to my palm and fingers
Cons: could conform a little more to my palm and fingers