Good choice for service and entertainment
Pros: The boarding was efficient and the crew was nice, polite, and mostly spoke English, which is a huge benefit. The crew provided a pillow+blanket combination, headphones, a toothbrush, two meals, several snacks, and lots of drinks including wine. As for entertainment, the flight includes several movies, tv shows, music, and games for free. I would definitely recommend Korean Air to a friend, but I would recommend that friend to bring a custom neck pillow.
Cons: Although the crew dimmed the lights during the flight, I could never get comfortable enough in my chair to sleep. The chairs do not support the human body, they only offer rollercoaster type padding. There is no neck support, and the pillow handed out by the crew is too big to be used as a back or neck support. Even lying back, the chairs are uncomfortable. The food could have had some warning labels in English on them. Since I'm lactose intolerant and unable to read Hangul, it's difficult for me to pick food I can eat without problems.