I've used several very expensive magnetic therapy blankets and had been led to believe that it had to be expensive to work. I really wanted one for my preschool son, but I did not want to put out the expense for one like I had previously used. When I got this one in, I put it on my bed to test it. Now I'm having to buy another one for him. Not only are my back issues greatly decreased, but I can guarantee that I will have a deep sound sleep, which for an insomniac is an amazing difference. I came back online tonight to see if I can find a bigger one for me, or else to get some more for all of my family.