I am somewhat disappointed in these.

First (and this is my fault for not reading the description more clearly), the wheels are decorative. I was really hoping the be able to move this around - I cannot.

Second, be aware that these shelves are not solid wood on a metal frame - they are made of laminate covering particle board. 

Third, these shelves do not sit level. I've only build one, but it rocks with a touch and is not, as a whole, very stable.

Fourth: Overall poor craftsmanship - apart from the items that have already been mentioned, some of the holes are poorly aligned - and of the crossbar in the back, I am actually having difficulty having one of the screws stay in.

I am seriously considering sending the other two back at this point. This is not a piece that breaks the bank, but at a price of nearly $300, I'd expect better quality.