Rating: 5 / 5
I love my Thermarest Stuff Sack Pillow (S). It weighs only 2 oz, and functions as both a stuff sack and a pillow. The exterior is made of silicone-treated Cordura nylon while the inside is lined with microfleece. When stuffed with my high loft insulated jacket, it forms a very comfortable pillow worthy of a 5 rating.
However, the comfort rating of the pillow depend on what it's stuffed with. If I plan on wearing all my clothes to bed, I'm bringing a different pillow.