The chairs just arrived, and they have to be returned / replaced. My error. I did not get the correct seat height. I purchased 4 some years ago and decided I would use two more. Obviously, I like the 4 I have, or I wouldn't be getting two additional ones. They are heavy and hard to move but I don't mind it. They look good and swivel well. 
There was no problem in the delivery process. The stools arrived during the time allocated and I expect no problems with the return. I like working with Wayfair and their allied Companies.