We bought a topper for an old mattress and pillow a couple of months ago. I was worried about back pain, and in the morning it was like being beaten with sticks after sleeping. Now the whole family is getting enough sleep and is delighted. At first, there was discomfort for the first couple of days, and then such lightness in the body in the morning, my back and neck stopped hurting. I feel that more energy has been added. My husband said it was the purchase of the year! We recommend :)