I buy the u-90 set and be surprise at the quality of they . I have work out with Powerblocks here and there over the year and be familiar with various set , include the SportBlock . but they utility be more than I think it would be . if you buy a stand , get the rack stand , not the column stand . these dumbbell be surprisingly heavy ; powerblock do not give a single ounce , so when they read 50-lbs. , you be get all fifty !