THe mattress is fine  Its not the same as a bed mattress, but very good for overnight guests.  Our problem was with the frame.  We were setting it up the night before we planned to use it for guests, found that we were four screws short, and it was too late to go to a hardware store.  The guy at our local hardware store told me that people come in frequently with the same sort of problems, due to various furniture companies shipping unassembled pieces that arent complete.  We like the futon now, but it was unexpected trouble putting it together.  Plan ahead for problems!