We previously had the Rhapsody mattress and after 11 years it was time for an upgrade. That mattress was wonderful but very susceptible to temperature changes. It was like a brick in the winter until it your body temperature Heated it up and Slept warm in the summer. This mattress does not do that and seems to not trap as much heat. This mattress has been great for us. The top layer feels like you're sinking down on a cloud but then there's a very firm layer that provides exceptional support. My husband is a back sleeper and I'm a side sleeper and this mattress works well for both of us.