This was an excellent purchase.  Thank you wayfair.  I had foot surgery and need to sleep with my legs elevated for 4-5 days.  I looked a long time to find the maximum angle for the foot part.  So I am able to have a zero gravity situation.  The head adjustment is independent from the leg adjustment.  I just purchased another one to allow for a king bed (2 xl twins) OR a king mattress where the controls are synchronized.  The mattress (not included) does slip, but we lay strip of counter non-slip cabinet liner from target and that solved the issue.  A true lifesaver and a great deal.