This is really a work of art. I'm very happy with it from a quality and materials perspective. The only challenge I found was that some of the pre-drilled holes in the shelf pieces were too wide to hold the screws. I had to flip the shelves and drill my own holes to fasten the shelf to the cross bars. That was easy to do, but if you don't own a drill, I can see that being a bit frustrating. 

On a related note, the delivery service Wayfair used (I'm in the Washington, DC area) did not call 30 minutes prior to delivery, as they assured me they would. Not a major inconvenience, but given the fact that the email (not a call) they sent the day before to confirm the delivery window went to my spam folder and I would have missed it if I hadn't been watching for it, I felt like the entire operation was a little sloppy.