Let me just say, I'm so in love with this piece.  Its perfect for my home office, the quality is amazing and it holds a lot of storage.
I was so impressed on how this arrived and how easy it is to set up.  Pretty much it already comes all put together you just have to attach the bridge.  The bridge even has 2 lips that hook to the side pieces, so it helps hold in place while you attach the screws. AMAZING.  Comes in 4 large boxes, very well packed.