I'd love to have a trackpad but I do really like the Magic Mouse. It's not super ergonomic, of course, but I like it more than most other traditional mice.
I know a lot of people that like them. That's cool. But it's not ergonomic at all. Not even a little. The only Apple mouse I ever liked (loved actually) was the ADB II. In my opinion, it's the last and only good mouse Apple ever made.