I check out the bowflex and the gold gym etc. and then I see these online , then check out youtube review and see they have they at Dicks sport goods . I go and check they out and they be everything I have want in a compact comfortable adjustable dumbell set . I can not say enough about they . who ever design they have there shiznit together . I buy the lower end line that do not have the 21\/2 lb increment , it save I about $ 80 . probably should have go all the way and get the higher line but I be more than happy with what I get . I be in the process of build my own personal excercise room and there will be limited space . I could not have buy a more perfect addition ! these be smaller and take up less room than any other out there .