I go this product because I have hear several radio show reference it and think it should be this really great product . I have actually be a little underwhelm by it and not quite sure if it be really do much . I have see the video and use it several time , but I be not really feel anything or see any result . my wife have grab it up and be try it out too -lrb- to try to firm up she arm . -rrb- we 'll continue to use it and I 'll leave a update , but for now , I be really not sure if it be worth the almost $ 30 I pay for it . pro : 1 . its not too heavy ... but not sure if this be really a pro since I want to work out . 2 . it look nice ... not sure what more to say about its pro . con : 1 . seem to only be use in a couple limited way -- although I guess these way be suppose to work out more area than what you think ... we 'll see . I hope this have be helpful ... I promise I 'll leave more later as we try it out . if it really work on my wife 's arm , then I 'll likely raise this to at least 4-star .