Hi,
In my opinion you can get the same results by sitting on a weight bench or step and doing knee raises--thats basically all your doing with this "machine". Save your money, if your not happy with how your abs are looking, try working them out first, starting with lower ab work first, and really concentrate on the contraction, you will get great results and it wont cost you a thing!! Then you have more $$ to buy Cathe tapes!! Hee hee.
Take care
Jayne