For so many years, I would stuff all my clothes into a stuff sack and settle in for the night on said 'pillow'. It was efficient and it worked, but never very well. I didn't find camp pillows all that much more comfortable, at least not enough to pack them along. And the inflatable pillows seemed like nothing more than overrated plastic bags.
Until the Exped pillow came along. I have found it most comfortable, in tents and even my hammock. Its unique design with baffles allows it to be used in various positions. Two breaths of air is all it takes to inflate and it packs down to nothing. I take it on all my trips now. I like it so much in fact, that I bought a second one.
It also comes with a repair kit, thanks Exped.