Likes:
1) First and foremost, Kim Soo Hyun. It's like he's got a tractor beam engaged any time he is on screen. My focus was solely on him. To become enmeshed in a country and environment that are not your own, for years at a time, to completely blend in, I could feel his loneliness. And yes, he will always be associated with green track suits! His cameo in Crash Landing on You was hysterical. Hopefully it brought new people to watch this movie after seeing it.
2) I felt that the storyline was original and well-executed.

Dislikes:
1) The ending. Granted, I think it ended the way it had to, but it left me with a blanket of sadness, and I really don't like to be sad!