This is a great drama that I can't believe everyone is sleeping on! I love modern Korea royalty interpretations. The story - although it does have several clichés - is very original in the way it is put together. You constantly know where the story is going and it keeps you on you toes. I love that in dramas. The second I ask myself while watching a drama "Okay, where is all this going?" it's loosing me. But not here. The character development of ML was amazing. He was so unlikeable in the beginning but became my favourite character of the drama. Also FL being badass and being able to save herself was extremely satisfying to watch while not loosing her femininity.
I do have some mild criticism concerning the acting of the foreigners (still don't get why they couldn't get better actors), the villain acted like such a clown in the beginning, the "cute" acting of FL was not good and the portrayal of North Korea did seem quite unrealistic at times. But I can excuse some of these points due to the drama being from 2012 - dramas just weren't as sophisticated back then.
But please don't let these points stop you from watching the drama - it's great and deserves a lot more recognition!