I agree with TD.. it CAN be useful. . I have had 2 different models over the years.. one I liked a lot one I hated.. I like the orignal version.. that said... for ME.. it was just "OK" if you didn't have a gym.. now that I am strictly bodyweight training.. it's not needed but it can work and work well.. consistancy is key, if you got it and used it reguarly it could be very effective