Already started to, delivery LONG LOT, 1 month and a half. It is touted as being adjustable and tiltable. In truth, there is no NI adjustable and tiltable STILL LESS. It is VERY BADLY sitting. VERY QUICKLY was backache. NOT AT ALL steady, "berloque" (a huge game) in all directions. I MUCH REGRETS that purchase. Do not let DUPER.