I buy a lot on Amazon , and very rarely return anything . I return this item . pro : - none that I can tell relative to other fitness option . con : - too long\/bulky -lrb- I be not a small person - 6 ' 5 '' -rrb- . - slippery plastic handle , far below the standard for any dumbbell , much less one you shake . this alone be a dealbreaker . - awkward motion -lrb- this be more subjective -rrb- . - weird\/gimmicky . 5 different size people in my family try this and none like it . that be the only thing I can remember all of we agree on in a long time . I buy it on a whim , and now be pay the price -lrb- around $ 8 -rrb- to return it . the rip dude in the infomercial be such a sell-out , I hope he friend at the gym never let he live this one down .