Does anybody have any experience with using a memory foam pillow to help with sleep? This was mentioned by the PT who conducted the class I took on fibromyalgia, and today, I stopped into a store in the mall where the manager showed me a couple of them. They're pretty expensive (normally $79 for a standard size pillow, on sale for another week or so for $56), and I don't want to spend the money if it just winds up like several other things I've tried--either doing no good or making things worse. So I really would appreciate any feedback anybody might have to offer. Thanks. --Laura R.M.