I purchased a bluetooth Mighty Mouse last week. I knew about all the hate prior to, but I just couldn't resist. I have this problem where I like my electronics to flow, for lack of a better word. I don't like to mix and match. So I used her for about a week. Yeah, she had some short comings, for sure - too minimal almost. No buttons to program for forward/backward; a pinch button that required way too much force to execute, and the eventual killer for me - ergonomics. The damn thing hurt my hand and wrist! Yup, already a couple of hours off of it (now using the Logitech MX Revolution) and I have zero hand fatigue. It's really too bad. I did love the trackball and bluetooth so much.