I 'll start off by say that if you be hope to look like the guy in the commercial , get a personal trainer and a dietician . you will not be super buff in no time from the Shake Weight . it be not for people who want to be perfectly chisel . but after 3 month of use it myself , once or twice a day -lrb- usually just once -rrb- , I can definitely notice a difference in the tone and shape of my arm and shoulder . in fact I notice after just a couple week . so for I it be perfect because that be all I really want . you can do it while watch tv or whatever to make the time go faster . and the faster you go , the more intense the workout , so you do not have to buy a bunch of different size weight that clutter up you house . so if all you want be a easy way to turn flabby arm into decently tone one , go for it ! I be definitely go to keep use it .