I found assembly very difficult.  The visual instructions were not especially clear, and it took me a while to figure out that the four bolts that go through the metal frame on the underside of the seat have to be entered at an acute angle from the front edge and then dropped down through the holes in the base while you hold the seat in the air and try to align it with the base.  I managed to get three secured and figured that would be enough to make the stool stable, so I gave up on the fourth.  Otherwise, the stool is exactly what I wanted for my kitchen counter and blends well with the two small utility pieces I've also purchased through Wayfair.