pro : - muscle ache and you heart pump enough after the six minute so I think it work - seem like it be relatively sturdy - cheap quick workout con : - make a weird clicky noise sometimes - at first it be really hard to get it move - use it be kind of weird -lrb- I mean hold it right and whatnot , it do not feel goofy or look goofy like everyone say it do ... and trust I I always say it look goofy until I try it -rrb- final thought : I think this would be a worthwhile investment and the pro definitely outweigh the con .