Stiff!
This product has the shape I think is well designed for head and neck support; however, the biggest downfall that I see is the stiffness of the pillows.  At first, I was having difficulties resting on it throughout the entire night, but over time, I started having headaches from laying my head on it feeling stiff, thus increasing my headache that was there mildly before.  After 3 months later, I stopped using it as a head rest pillow, instead, I place it between my legs or prop my legs...I had purchased 4, for me and my teenagers. I have yet to find the right pillow for degenerated disc in my neck and that does not make me feel worst in other areas at the same. :(
Rating: 2 stars