I purchase the SelectTech Dumbbell stand at the same time I purchase my  bowflex selecttech 552 dumbbell  with the number of time I change the weight on the dumbbell the stand make this a breeze . well worth the investment . I have see some review that say the assembly instruction be difficult to understand and follow , but mine include a easy to follow booklet that contain a explode diagram plus several detail page with easy to follow step . it take about 30 minute to set up mostly due to the number of bolt require to put it together . the construction be solid and sturdy . I only give it a 4 out of 5 since the wheel -lrb- optional -rrb- be basically useless if you be try to move the stand and the weight on carpet . for the most part I just keep they in one place so it be not much of a issue .