It true, there are no directions for assembly. That said it isn rocket science, it really only goes together one way. Extra parts are supplied. A pair of pliers is helpful for tightening the nuts. Also, I suggest not fully tightening the nuts until all the shelves are installed. Then tighten them all with the help of your pliers. Yes, you need to decide at what level you want your shelf before you install it. It not a big deal. (I did it myself 67 year old female. ) Very happy with this purchase.