Review (2/5): Not the greatest
It works, but I do find myself waking up 2-3 times a night to adjust it cause it does slip farther back than I'd like it to. It's pretty much the same material as panty-hose... not that impressive. I did buy a dreadsock, so I'll be able to compare the two once it arrives.
*Update* I've been using my dreadsock for quite a few weeks now and I must say... it's 10 times better. Stays put and made out of a much better material. A better investment if you ask me.