The hidden spaces on planes that are off limits to passengers
https://edition.cnn.com/travel/article/airplane-crew-sleeping-quarters-cmd/index.html
If only 10% of the flight time is usable to take rest on the area, it must be uncomfortable to get up after sleeping there. Especially, when it comes to overnight flight, it must let me feel sleepy. So, I don't envy the privilege flight attendants have.
