let I be up front . I be 48 year old and overweight . because of a hip problem I get out of shape because there simply be not a good work out that do not require hip and leg action . so I see the ad for the Shake Weight and laugh . 5 pound be go to make a difference ? right . then I be in a video and see how awful I look and decide for $ 20 buck it be worth try . six minute , 5 pound . ok , do not sound tough , so I boot up the dvd and follow along . 30 seconds in I feel the burn . 1 minute in and I be sweating and burning . I will get to six minute eventually , I hope . this thing work . my goal be not to look like a body builder , just to tone up and slim down a little . do not know about slim , but tone ? yes , this thing will do what be say . the only con be that it hurt to grip . I have small hand so maybe that be the problem , but a better handle shape would help .