Have had this throne for a month and this comfortable seat has provide some needed back and bottom relief. The seat is very comfortable and has room enough to shift positions from time to time. The backrest slants back a bit and allows the bottom of the rest to support your back while sitting straight and the whole rest to give support when sitting up straight. It has two oversized knobs for adjustment in and out and up and down. The seat attachment thumb screw is in the way of the back comming in too far, yet this could be fixed by removing some material from the backrest arm on bottom. Overall this is one of the better backrest seats for the money. I especially like the overstuffed seat with the velour top.(very comfortable.) If I lost this I would get another. So long hard little drum thrones, hello comfort.