Instruct: Classify Amazon reviews into positive or negative sentiment
Query: chill pillow

I was very disappointed with this product because it was extremely difficult & uncomfiortable to use. It would bunch up while i was trying to sleep. If I moved, the pillow did not move with me. It did not stay cold al;l night. All in all, I wasted my money on this product.Deborah K. Dee, Ph.D.