Even if some things or ideas were taken from other series, I still think the series is worth watching. great action, and exciting until the end, because you don't know whether good or evil will win. At least for me there was no indication which side would win. it's worth to watch. and for me don't need a season two. the story told to an end.
the actors and actress did a great job. especially Kim Woo-Bin. He is the right leader and voice for the people who can't stand for themselves . it's my first review