My mom had one of those for awhile. I don't remember what ever happened to it. I got on it a few times, thought it was fun. If memory serves, such devices have been deemed not only useless but hazardous to health in the intervening decades. My mom also had a big, heavy massage block-like thing that she sort of reclined on ... it's purpose was also to assist in weight loss ... funny, 'cause she wasn't overweight but she was always wanting to break down fat and remove it from her body.