Matt Fullerwrote a review of Therm-a-Rest Compressible Pillow on October 17, 2008
The Thermarest Pack Pillow has been fantastic on many of my trips where I find myself lacking a suitable pillow.
Just loosen up, beat the crap out of it, and wait 15 minutes before crashing for optimal fluffage. Medium is my optimal size (strictly carry-on bags/size+weight ratio), your mileage may vary.
Maintenance + care:
When you're not too busy beating it, just be sure to wash it every now and then. Please be considerate of your pillow's feelings and use a front-loading washer if possible. Fluffageability remains constant even after frequent purgings.