The MM is a great mouse, what really irks me is that you really have to abuse the scroll ball for it to not function properly. My local college has a whole lab of imacs with MMs and only a few don't scroll properly, and none of the mice or keyboards were cleaned in 3 years. so quit complaining... mine is fine and so are my various 20-30 friends who have the wired version for pcs...
I think that's a slightly patronizing comment. I've had my MM (wired) for as long as I've had my Dell mouse that I use at work- guess which one needs cleaning more often? The MM. In fact the one I have to use at work has NEVER needed cleaning. It has a scroll wheel and that works just fine. The tracker in the MM on the other hand worked well for about three months and since then has needed constant cleaning... and NOT because I abused it or sweated too much or anything like that... it just doesn't withstand regular use. It's not very well designed/built.
The Rocketfish hopefully won't be so high maintenance.