We have a foam mattress that I began to suspect was contributing to my chronic back pain. I had my doubts that more foam could help, but since the price was right, I went ahead and ordered the topper. From the first moment I lay down on it, I felt a tremendous, positive difference. It's been a few weeks now and I'm delighted to say that this topper rescued us from having to buy a new mattress. Thank you, Sweet Night!