After using this comfortable (I'll give them that) support, I have discovered that within a few hours of use the memory foam has squished down to nearly completely flat. I weigh 152 lbs., not overly heavy by any means. I primarily lay on my back, but occasionally shift to my side. Either way it's flat as a pancake within a short time. I flip it over several times during the night, but this does little good. I make sure my shoulders are all the way up to the highest point to get maximum effect. It's not too hot, nor lumpy, nor uncomfortable, but I can not see how it does any good as to elevating my torso. I'm exremely disappointed, especially after reading all the reviews carefully to help make my decision. I have to wonder about all those good reviews now... authentic? If you only need elevating for a few hours, go for it. If your looking for an all night solution, like I am, keep looking.