This mattress was a huge surprise!  The price is the best I've seen for a memory foam mattress, and it is very comfortable.  I would rate it as Soft so beware if you are looking for a firmer sleep surface.  It took nearly 24 hours for the 12" model to fully expand but it is perfectly shaped now.  I purchased it for a guest room bed but would consider it for daily use too.  Highly recommended!