That's the polar opposite of my experience. IMO Apple should take a note from Logitech's book as far as mice go. The MX Revolution is as close to perfect as I've ever used in a mouse. The ergonomics are perfect for my hands, scroll wheels are logically placed and work well. I've had no problems with my MX Revolution whatsoever.
If Apple came out with something similar to the MX Revolution then I'd heavily consider it. But as is the ergonomics really need work, I absolutely cannot use the Mighty Mouse for extended periods of time because my hand cramps up. More buttons would be nice, my MX Revolution has a good amount of buttons, all of which I use on a regular basis and have really improved the speed of my workflow.