We just bought a brand-new travel trailer (Keystone Hideout), were so excited to spend the first night there until we got on the bed, which was hard as a rock. Would have been just as comfortable to toss out the mattress and sleep on the particle board underneath it. Found a full-queen on O, of course it was too big. Then checked and found they have "short" queens. This is EXACTLY the right size for our trailer's bed. Came in three days, pulled it out of the box, and it immediately sprang up (like a miracle!). We're letting rise the whole 12 hours, but can already tell it's comfortable. It's also amazingly lux- NOT cheap, sleazy material, but covered with a nice quality padded fabric. I can't believe we only paid just over $*** for this mattress. Now I am all excited about camping again and can't wait to try it out. HIGHLY recommend this mattress.