Improved my bed dramatically. My mattress was very thin and uncomfortable to sleep on. It is now much more comfortable and has saved my bed, for now. Not sure how well it will hold up, I've had it for about a month now and it seems like it may not be as thick as it first was but I may just be getting used to it and over the initial shock in comfort. We will see how it holds up over time but it definitely improves an uncomfortable bed.