There are 2 "buttons" but right clicking means actually LIFTING your left finger up. The side buttons need the strength of a gorilla to register. The scroll ball constantly has you flicking forward and back pages as well as scrolling up and down. The mouse shape is uncomfortable. It's expensive. The mousing action is ok.

I had no idea I could HATE a device this much until I tried one. It's a mouse for heaven sake - surely they're all much the same. No, this is over engineered rubbish that tries to be too clever and fails in every single way. The cheapest plasticy Logitech mouse is better than this. Now if only the Mac actually supported Logitech mice properly without needing a special community supplied driver.

As I said above this is the worst mouse I've ever used. Even I'm surprised by the venom with which I loathe this mouse. I hate this even more than I hate the new Apple keyboard - and that's a lot.

I love my mac. I use a PC keyboard and mouse on it.