I put together 3 of these by myself, although my hands have significant arthritis.  Took me a couple of hours to do all 3.  Every piece was correctly marked.  All of the holes were pre drilled in the correct places (although a couple were not completely drilled and had to be scraped out).  I think they look great, just like the picture.  However, I can screw up anything I do and in lining up the holes, I actually broke one of the uprights.  It’s fine.  I was able to repair it with heavy-duty caulk.  NOT the manufacturer’s fault!  BUT you do have to be somewhat careful with the pieces during assembly.