This kdrama!!! I loved everything, from the very first minute of the first episode to last second of the 20th episode!! I know most of the people were disappointed with that ending (even I was a bit at first ngl) but I came to an understanding regarding the plot line with has such a great potential into turning out really great in the 2nd season (they couldn't have includ everything in the last 2 episodes anyways!! it would have been rushed)
For the acting , personally I adore historical dramas , let alone a FANTASY HISTORICAL drama!! It was such a masterpiece, the cinematography , everything!! I wish I could watch this drama for the first time but unfortunately I can't, so right now I'm waiting patiently for the 2nd season.