The first one I ordered arrived damaged, and Overstock was excellent to deal with as far as returning even this heavy, cumbersome item. Customer service was extremely helpful & sent UPS back to retrieve the broken item (the UPS driver was far less delightful...). That said, the item itself may very well be helpful to others, but I have to rate it based on my own personal experience, which has been a pretty negative one. This little machine really, really hurt my lower back.... to the point where I was seriously worried that I might end up in the ER if I used it again. The first time I thought it was just a coincidence, but the 2nd time it was actually worse - I could barely get myself out of bed, stand up, or walk the following day. I'm a regular exerciser that work outs every day, but apparently my lower back was not strong enough to handle a mid-to-higher speed on this little devil-machine. Use with caution, especially anyone that's ever had any sort of a back issue. Can I just say, ouch!?!