Got this mattress to replace a medium firmness memory foam mattress that I was sleeping on. I wanted extra firm, as my old mattress lacked enough support and I woke up with a back ache every day, due to chronic back issues. I was afraid that it would be too firm for my wife, but we both love it! I have honestly slept the best I have in a long time, and so has she! As a hybrid mattress, it has a solid base of pocketed coils topped with several inches of dense memory foam, and is built to last. It also sleeps cooler than my old mattress. I’m so glad that I got this mattress! I will sleep comfortably for many years to come!