I finally was able to set this up to use in my new office. One of the drawer hinges on the left side is broken or bent. It will not click in no matter what I do. One of the drawers it now sitting on the ground, which is extremely inconvenient. 
I looked to see if I could order the faulty part separately and there was no option to do so. 
For reference, it is Piece 14 that is broken. 
Very disappointing spending hundreds of dollars, spending hours assembling, and the drawer will not work.