Since there were so many positive remarks - I'll add mine. On our 19 foot, I had read good reviews on the mattress and the first night I thought it was fine. After a week, my back and hips were beginning to hurt so we stopped while on our trip to buy a solid latex mattress which we love. It does seem much better than the norm. So, if you aren't starting with a delicate back, you will probably be fine.
Hybrid Mode
