Review (4/5): Takes getting used to, but does the job
As others have noted, it takes a while to get used to this pillow. I had about a week of very restless sleep (waking up almost hourly!) until I realized that, as a back sleeper, I should put the ends of the pillow OVER my shoulders instead of under (when I slept with shoulders on top of the pillow, I kept sliding and waking up). I'm not sure if part of that is that the pillow squooshed down a bit during that time as well. There are no directions with the pillow that indicate how to use it, and the photos (here and on their site)don't help either.
Since I've been using the pillow (that I bought in a panic after waking up one morning with a big 'new' crease on my face, that thankfully didn't last all day!) my hair looks great in the morning (no 'bed head'). My 'morning face' looks better as well (no more scary "my gosh, where did that come from!" new creases: at least not so far).