This has saved me from having to purchase a new mattress! After about a year on what used to be a comfortable mattress my back started to hurt. I got this and not only is it super comfortable but I no longer have any back pain after sleeping. The only negative is it does have an odor to it so I suggest letting it air out for at least a week before using it. Also, with an already deep mattress then this on top it's hard to find sheets deep enough to fit, or at least at stores around town. I guess I need to shop at Wayfair for some new sheets now!