Using an old futon as a bed due to space issues. The mattress was to the point I could feel the rails. Saw this & bought it. MY BACK IS SAVED!!!  Its like a whole new bed!! It takes some getting used to- I'm one of those toss N turn sleepers.  I dont do that as much now.  Also using just 1 pillow instead of 2. It has made sleeping a much better experience.  When I get around to getting a regular bed I'm tempted to just get the frame & use this as the mattress.