I feel like an idiot.  I had to put this thing together and take it apart three times to get it right.  It is also much smaller than the picture they show implies.  For awhile I was sure they sent me the wrong shelf.  I should have paid more attention to the exact specifications.  And, as you would expect of something made of particleboard that you put together yourself, the quality is not great.  It does seem sturdy enough though.