Ab Circle Pro??
I think its just a gimmick. One of the workout balls would be good to use, and a lot cheaper. Plus can do so many things on one. Crunches, weights, resistance, all kinds of exercises out there. And your not limiting yourself to one exercise only with a bulky piece of equipment. I think most people will agree when buying a piece of equipment besides treadmill, bike, or elliptical, try to find something that will allow you to do multiple work outs.