Serta Perfect Sleeper Capitol

Not sure why this mattress got a bad review. It is not too plush nor too firm. It has a material that does not heat up or feel weird like memory foam. Whatever it is made of feels really good to sleep on and we keep the mattress set in a guest room where we have been told by a few friends it was some of the best sleep they can remember. On a few occasions I slept on this mattress when I set up a tv in the spare room and I can concur, I slept like a baby.