I purchased a good quality mattress a while ago but kept on waking up in the mornings with back ache and stiff back muscles. I thought it was because of my gym work-outs. I decided to try out the Visco Pedic mattress overlay as I had already invested a lot of money in my existing mattress. The results was extraordinary. Within only a few days my body adapted to the soft feeling of the overlay and it has been wonderful from there on. What a fantastic product. No more pain.