by far one of the best exercise equipment investment I have make . the review other have write speak for this product . the only complaint I have and it be more of a nit-picking , be the metal can make a clank sound from hit together when perform various lift . however , the clank sound be definitely not loud or distracting . I have use these dumbbell through 6 round of p90x and they still perform & look like day 1 . the label on top & plastic color label to slide the pin in be still like day 1 show no sign of peel , crack , or discoloration . the actual pin & elastic string that hold the plate in place be both hold up like day 1 . I have never have a pin even slip or even budge from hold the plate . I know they will last forever therefore will be purchase a nice stand to keep they at a better height for r&r; .