I have been thinking about getting an ab circle pro.

http://www.amazon.com/AB-24689-Z-Ab-...6674849&sr=8-1

I have read several reviews for this machine, and it appears to be a love it or hate it thing. Alot of folks said its hard to use, and more than a few said theirs was broken when it was popped out of the box. Some said it did nothing but waste their money, and others said it was very hard to use, hard on the knees, and the only thing they lost was their money.

Does anyone have this? What is your opinion?