I ordered my mattress and received it faster then I expected!  I let it rise for over a week before using it but it never reached the expected 9 inches.  The first night sleeping on it I was worried I made a mistake but after another couple of nights I couldn't be happier with it.  It is very firm and supports my body weight perfectly.  I can see why it would be hard to fold for seating but I plan on just using it for a bed.  All in all depending on how it holds up of the next several months I would recommend this futon mattress.