This bed system was extremely challenging to assemble.  Fortunately, I had two experienced handymen at my disposal who were able to do it.  I'd say it took them about 16 hours.  There were some slightly misdrilled holes, some extra screws for some things and some missing ones for others.  I'd printed the assembly instructions off the website and they differed from the ones in the boxes.  I'm guessing there had been updates.  The bar at the end of the bed barely covers the mattress, so when the mattress slides down when the bed is up, it comes out of the bar and stays in the cabinet.  We worked around that by applying a velcro strip across the mattress (see photo).  Challenges aside, it's a beautiful piece and we are very happy to add it to our home.