Well we finally have the Greystone back and the sofa has been "fixed" according to Seating Technologies instructions. Guess they had to nearly rebuild the back of the sofa. It now appears that the mattress will lay flat and not be slanted, but to correct that problem, the back of the sofa has been raised. This now means that when you sit down on it, the back of the seat cushion is higher than the front. It only took four months. What a mess! Heartland should be ashamed of putting such a junkie piece of 'furniture' in one of their units. I would much rather have had to put up with the issues with the Flair sofa air mattress than have to live with this piece of ____ - you can fill in the blank.