I already have a MBP, and talked the wife into getting an iMac after the dell (she loathed this machine, so made the sell very easy) crapped the bed. When deciding on a bluetooth mouse for my MBP, I passed on the mighty mouse wireles becasue of mostly the review here seemed negative. I ordered the corded version for this imac that came friday. Long story short, I have been using the MM and found it to be quite enjoyable! In fact I actually prefer it to the Logitech V220 that Im using now. I found out that I have a tendency to lift my left finger off the botton even when using a normal 2 button mouse. This made the use of the MM very natural to me. The absolute best part of the MM is the freaking scroll ball. That this is almost orgasmic to use!! I L O V E the mechanical smoothness and feel of the ball in motion. Using the app steermouse I was able to fine tune this puppy to perfect. For ANYONE on the fence about the MM, let me assure you that it is pretty awesome, and from a person that is ULTRA picky to the point of OCD about my mice.