Was thrilled when I got the chair today finally.  Not so thrilled now. Its a nice chair but the seat is hard and uncomfortable.  I cant imagine not having issues with this for 10 hours a day.  It does have nice height adjustment but you better be at least 5 feet 7 inches to reach the floor at its lowest setting.  It also tilts forward so you are not getting the back support as needed.  For what I paid for this I think I am packing it up and returning it.  Just not for me.