I have recently learned that I wasted 10 years of poor sleep due to my back. My wife had rotator suff surgery last year and could not recover competely. When her other shoulder started hurting, we knew that something had to change. She constantly complained that our mattress was hurting her shoulder and actually was sleeping on our couch many times a week. I took a chance on this topper (the price of one week physical therapy) and I'm so glad I did! Within a week, my back quit hurting when I awoke. I could also work all day without lower back soreness! Within two weeks, the should er that my wife had surgery on had recovered more that a year of therapy had accomplished. Better yet, her other shoulder had stopped hurting and I do not have to sleep alone! This was such a great response that I ordered another complete memory foam mattress and moved the topper to my teens bed. He loves it now. I recommend this to anyone with back or shoulder pain that has reduced sleeping to a scary activity.