I read a few review about build this say it be tough , so I be wonder what I be get myself into . the instruction be a breeze , there be 3 different long screw , and as long as you place they next to each other , you can tell the size difference . it take I about 15 to 30 minute to build this with a 9\/16 '' ratchet wrench and the allen key they supply . Make sure you have that wrench or a adjustable though . its pretty sturdy , I opt not to put the wheel on as I will not be move it at all . it alleviate tension off of you lower back and make it easier to place the 1090 dumbbell in there holder without mis-alligning of damage they . definitely recommend if you buy the 552 's or the 1090 's . I have see it online on Amazon between $ 129.99 and $ 148.99 . I purchase it at $ 139.99 because I could not wait any longer .