I was definitely happily surprised with this purchase. This office chair has many surprises. The armrest can be raised on either side if not needed. The seat and back of the chair are very comfortable. The chair has a lever that allowed you to rock, yes, actually rock and lean back to release any muscle stress or tension. The casters are so cute with a white accent ( black and white). This chair was purchased for my son’s game desk. He’s more than happy with it.