This memory foam topper was a gift for my wife. I searched for hours, reading reviews, comparing prices, and trying to guess at which one she would like that wouldn't negatively affect my sleep. I wasn't sure that I would be happy with any of them. However, she loves it, and I sleep comfortably also! Glad that I made the decision to purchase this one. The only thing left is to see how long it lasts. There was no bad smell, we did leave it to air out for a day. Haven't noticed a over heating issue but we live in northern Utah and it is the middle of winter with overnight lows that are well below zero! So far, so good!