The chairs were very easy to put together - I speak for my husband who had them together in no time. They are very comfortable. Love the swivel! The back is supportive, even though it is not tall. The only con is that I feel just a little bit like I am sliding forward, but it isn't a huge deal. But for that reason only, I didn't give 5 stars. The adjustable height is smooth and easy. All in all, these are fabulous chairs! And I especially like the fact that the base has a rubber pad so they don't mar my wood floors when I slid them under the bar!!!