I purchased 2 toppers early last year, I suffer from a crumbling spine,and fibromyalgia, had been in terrible pain for 10 years, especially at night, bedtime was so painful for me, I had to medicate to help me sleep, we have an electric bed hence the reason for 2 toppers, I arranged the foam inserts in the manner on the chart for my specific problems, I am not telling you lies my pain at night has almost gone I no longer have to take amytriptoline at bedtime just to get some sleep, I wake up with some stiffness as you would expect,after all there not a miracle cure but I can't stress how much they have helped me.