This review is from: 3M(TM) Repositionable Precise(TM) Mousing Surface (Office Product)
This works perfectly in my set-up. Very accurate to use.
From time to time cack gets on my mat, not 3M's fault, and you have to give it a wipe to clean it. Obviously. But this sounds silly, I know, 'cause you'd have to keep any surface clean; but with my Apple Mighty Mouse the feeling is weirdly creepy, like fingernails dragged down a blackboard, so a clean mat is a happy mat.
It does work really well and I do recommend it for use with Mighty Mouse.