I have to admit, I was skeptical at first regarding buying a mattress that comes in a box. This mattress was very easy to set-up and filled up to its 13.5 inches in less than 24 hours. 
Our first nights sleep on this mattress was excellent! Just the right amount of give and firmness. We had no back pain in the morning. It was a great nights sleep without sweating! I would definitely give this mattress a try.