Just done watching it and all I can say is it is simply spectacular! One of the best sageuk dramas that I have ever watched! There's a lot of twists and turns in the story that will surely remain deep down to your core. The action scenes are great and realistic. The costumes are sophisticated and well-detailed. All actors have done a good job on their own particular role. The 51 episode is worth watching, actually after the ending you would wish that it is somehow longer than 51.