To begin with, these swivel stools are advertised as "bar" stools and the standard height of the seat is normally more than 28 inches. We received the cartons that are labeled "counter" which fits that description of a normal height of the seat as 24 inches. 
We tried to assemble one of the stools and found that two of the seat cushion holes for screws were stripped so the screw would not hold. The screw labels were incorrect in that "A" screws were really "B" and the "B" screws were really "A". Small item but the allen wrench long end, had a small ball so couldn't be used to tighten. Could not figure why.
Customer Service was excellent in helping us through the return process.