I have a total of 3 of these units.  Only one of them was relatively easy to assemble.  On the others, the holes do not line up from one piece to the next, and one of the units actually came with two left-hand pieces instead of a left and a right!  Returning it would have been too much of a hassle, so I rigged something up.  Now that the units are "finished,"  they look OK and they do hold a lot of shoes, so they are better than any previous shoe rack I have owned.  But I would not recommend them to someone with higher standards.