I'm writing second-hand because I bought this for my granddaughter after having slept in her bed during our last visit and coming away with a backache.  She got this after I left, so I haven't tried it personally.  But my grand says she loves it and it is very comfortable. She is extremely pleased with it.  And she says it didn't get too hot for her in the summer as some memory foam mattresses do.  I am only giving it 4 stars rather than 5 because I haven't personally tried it.