When I first saw this mouse I thought it was a great idea, and I still do, but it needs to be improved slightly. It's awesome to play first person shooters with, but only for the first five minutes. Even with my incredible wrists and forearms I can't hold my arm in that awkward position for too long. What I'm getting at is that it needs an armrest. And for $70 it should come with one. It should also come with a warning that reads "If you use this mouse at work and yell "bang! bang!" whenever you click on something you will probably be fired." Because, well, that's what happened.
Move Up to a 'Higher Caliber' Pointing Device [therawfeed]