I have read so many negative review and positive review . if you can return something , why would you listen to other people . find out for yourself . I buy it one month ago and I can not believe my eye . my flabby arm be become tone and I have not even get to the six minute a day . the tricep workout be so hard . I plan on use the one for woman until it become too easy . after that , I will buy the man 's Shake Weight . it be the first thing to ever work .