We were looking for a couch that was comfortable to sit on, daily, and to be slept on only occasionally.  We've had the couch over a year and it looks brand new,  is way more comfortable than our old one and it has not been used as a bed, yet.  When we used our old one as a bed, we reinforced the frame with 3 sections of plywood and a substantial mattress topper.  I imagine we'll do the same when we use the new one as a bed, since it was a very effective way to make it feel like a real bed.