I can see my house from here!

So, I got two free Tempurpedic Symphony pillows with the purchase of the mattress. Does anybody actually use these things? The material is great, but they're what, a foot thick?! Using one feels like I'm propping my head up on a couch. They're great for watching TV, but I have yet to use one for sleep for more than about 5 minutes. I seriously wonder how anybody could sleep on one of these through the night. I suppose if you like your chin touching your chest or your ear touching your shoulder, etc. I'm quite sure that if you tried to sleep on your stomach on one, you'd spend the entire next day staring at your own butt. Eesh.