I purchased the bed base with the bookcase headboard.  It took about four hours to put everything together -- it wasn't difficult, and all of the pieces were there (the only concern was that some of the pieces were chocolate instead of black; fortunately, they didn't face the outside, so I didn't have to return anything).  The only concern I had was how damaged a couple of the boxes were when we received them.  I suspect this isn't a problem with the manufacturer:  everything was very well packed inside the boxes ... almost as if they expected their freight carrier to be less than gentle.