when I purchase the Shake Weight , I know full well that I have to do the shake . its a sad thing that so many people buy this product , think it be a machine that shake itself . you have to work for it !!! however , I say do not buy this piece of crap because it break . it do not break when I be work out even ; no , it be sit under my desk and I be rest my foot on it and the end just pop right off . do you want that thing to fly off into you face people ? this thing be a hazard , and I be lucky . I would hate for someone out there to actually be work hard with this thing when the end fly off and suddenly , you need a nose job . save your money people !!! if there be a rating less than one star , I would use that .