Update:  Wayfair was great and sent a replacement cylinder right away. Unfortunately, the new cylinder failed after about 6 weeks. I'm sure this would be a great chair for a normal-sized person. (I weigh 270.) Extra-large people should probably avoid this one.
Original Review:
The cylinder that holds up the chair failed almost immediately. I like that arms fold out of the way and hope I can find that feature in another chair. Steer clear of this one if you are a very large person.