not very comfortable
I was expecting something a little softer but it is hard plastic.  There's no cushion or padding.  When you place it underneath your neck, the little knobs actually hurt and it's not very comfortable.  It is hard to get adjusted to where it doesn't hurt or isn't uncomfortable.  I will continue to try to work with it and see if I can figure it out but for right now, I give it 3 stars because it does seem to be made very well and the idea is good.
Rating: 3 stars