foldable is a great concept [SEP] easy to use and easy to store are two of the best features this product has going for it the bubbles are nice as wellthe heating element gets extremely hot and is easy to brush up against if you have large feetthe shiatsu rollers are do it yourself so you have to move your feet to get any benefit again increasing the likelihood of touching the heating element if you have big feetgood idea but needs a redesign