Assembly is not difficult for one person if you are experienced in putting furniture together- took only 30-45 minutes.  Directions are a bit vague if you have not done this before.  End product looks exactly like pictures.  Height of chairs is exactly as depicted, swivel mechanism is good, and chairs are stable.  I've only had them for about a week so durability is unknown.  The reason for the 4 stars is that a piece of plastic from the frame that sits next to the seat, a bumper, was damaged on both chairs that I ordered.  It was pushed in on one chair and hanging by a plastic thread on another.  I had to fix it with glue.  I was too far into the build to ask for a new part and it is semi-hidden but it takes away from the quality of the chair.  Otherwise, the chairs fit nicely in the kitchen island