While it did take me about a week and a half to get used to sleeping on the Ghost Pillow since it was so different from my old (VERY old) pillow, now sleeping on the Ghost Pillow is great. I sleep well and don't wake up with neck pain.
There is nothing inherently wrong with the pillow. It is a good quality pillow. It just doesn’t work for me. I was hoping it would help with neck and back issues but it just ended up making my neck pain worse.