as long as you can get past what it look like , the shakeweight be a great product that actually work . be you go to turn into a bodybuilder , no. . however , after just a week or so of do the 6 minute dvd , I be definitely tone to the point where it be noticeable and my arm definitely have contour that they do not before use it . for $ 30 and 6 min a day this be a slam dunk . Fair warn though , they be 6 intense minute .