My husband and I have used a foam mattress topper for several years. Recently, we bought a new mattress only to discover it was bit too firm. We bought this topper to soften the mattress and relieve pressure points. It is more like a gel foam. Not quite a firm as our last topper. We really like it. Since we have slept on a foam topper before, we were accostomed to the "sinking" feeling you get when you sleep on a topper. I am a side sleeper. My husband is a back sleeper. Most foam toppers retain heat. Its just part of the experience. We live in Florida, so, it gets hot in the middle of the night. Nothing too terrible, though. We have slept on this topper for about one month and every morning my husband comments on how good this topper feels. This topper has a very luxurious feel. We love it.