The "massaging hula hoop" isn't so massaging after all. My sides have officially been tenderized, but does provide a great workout. I'll give it that much. Box does say you will burn up to 100 calories every 10 minutes and I believe it. Does take awhile to put together. You get 3 bags in the box. A bag of magnets, a bag of white half circle clips that connect to the hoop, and a bag of clear half circle balls. There is at least 50+ little balls to put together before you even put the hoop together.