Originally had my mind set on the 12 inch hybrid regular mattress because I recently purchased one for my son and it was a really great mattress too. But when I got in the store, I described my pain and the salesman recommended I try the foam. Well, I instantly fell in love. I wanted the 12 inch but they were out of stock and I was anxious to take it home because I had already gotten rid of my previous mattress. Best decision I have made this year! This is an amazing memory foam with cooling gel, and works for me especially since I am always hot. The firmness has been an instant relief for my lower back pain. I don't even want to get out of bed and I have only had the bed one week.  I am however, looking to purchase a different foundation because my previous won't cut it. I have an antique style bed with headboard, footboard, and side rails, so I need something that fits and is sturdy.  Just know that you will not be disappointed ordering this mattress!