I first saw Memory Foam used for surgical patients when I worked in a hospital, and after experiencing it, I never have wanted any other kind of mattress. Pros: It responds to the heat of your body, which is why the areas in between sleepers in a shared bed don't cave in like they do with a regular mattress. When you lie on it, there are no "hard spots" like there are on a regular mattress, and no pushed up broken springs. And my back has not been sore in the mornings like it was with a regular mattress. Cons: It's more expensive than a regular mattress, but I think that it's worth it. Also, this foam can be cut easily - my dog's and cat's nails leave pin holes in the foam. It can also rip easily if you fold it - so store it flat. Finally, I've had mine for about 10 years, and it does become less pliable over time - you just don't sink into it as far. I may consider getting a topper, and have tried a few - any thickness under 4 inches is too thin to let you get the fully comfortable feeling of the foam.