No, but will be interested in seeing the responses as the wife is having trouble sleeping at the moment and reckons one of these may help.
I have a bunch of these things, I can't remember where they came but I do remember that some were quite expensive. I can't recommend any of them.
I've just bought a Latex Dunlopillo and it's brilliant, think it's one of these Link
As it's latex it breathes a lot more than memory foam but still has the same cushioning effect.
I also used to snore badly with my old pillow, but the new one has stopped that.
It was around £40.
Getting a bit on the medical side, but might it not be better to sleep without a pillow?