Initially when I lay on this pillow I thought that it was marvelously perfect. But after being on it for a few minutes I began to realize that it was too tall. My head cannot comfortably lay on it for extended periods of time...it feels like a force is pushing against my head. I tried for 3 nights to use it, but gave up. It was quite uncomfortable and hurt my head and neck. I think it would be great if it weren't so tall. Maybe I should have gotten the medium or soft, even though I do sleep on my back. It did seem to be better if I was on my side. Unfortunately I've spent a good bit of money on an item that can't be returned and I'm too nervous to buy another on overstock. It does make a good "prop up" pillow.