I just purchased this the other day and I am absolutely in all with it. I have A lot of Bone disorders that are happening to me and especially in my feet and let me tell you this is absolutely worth every penny easy to use I honestly don’t see the point of the middle area that you have to put for protection in case it collapses because there’s no reason for it to collapse other than that the massage is absolutely wonderful easy to keep up I highly recommend it for anybody with chronic Illnesses and bone disorders in their feet I feel like a million bucks!