I own two of these units; purchased separately.  The first unit took a few hours to build and frustrating to say the least.  The directions were not very clear, and took a few tries to perfect.  However, when I finally decided to lay it out and work without the directions, it was a success and turned out very well.  Seeing how well the tower holds up and how secure the shelves are was very satisfying.  Unlike previous media shelves I have owned, the way the shelves are designed is to allow for less weight to sag in the middle and cause bowing.  The shelves appear tidy, but the quality of the wood is not very good.  Make sure to be careful not to hit a nail at an angle.  The cardboard back was difficult to put on both units, but the design allows errors to be hidden.  Overall, I'm very satisfied with this tower, but this is certainly not a 5 star product.