Not impressed with this item whatsoever, especially for how expensive it is. I bought two of these shelves. The wood shelving is a very cheap and light weight species. One of the shelves had a large soft spot (looked and felt like cork). I dug out the bad wood and filled it wood-filler. 

The worst part are the metal brackets. Out of the 4 brackets I have (again, I bought two of these shelves), only 1 of them was straight and well made. The other 3 brackets were visibly crooked. This was very apparent when I was trying to use a level, but once I hung them, I could see it with the naked eye as well. Ugh. I would NOT purchase these shelves if I were you, especially for the cost.