I bought this in a twin and a full for my daughters bunk beds. We moved to a new house and we haven't brought our furniture over yet so I had the pleasure of sleeping with them. OMG, these mattresses are great. All I know is I spent WAY to much money on my bed because it certainly does not compare to these ones. I sleep so great and wake up with no neck pain or back pain. At first I thought that they were going to be too firm but that is not the case at all. I sleep great on my back, my side and my stomach!!!