Great beginning and I loved the very last episode, which was packed with action and suspense. Great performance from all of the principals, despite some uneven quality of writing in the middle of the series.

The two adolescent leads were fantastic, but the miscating of Han Ga In almost ruined the series. Next to her younger male lead, she looked homely and matronly and radiated zero charm or charima as a supposedly young maiden in love. Contrast the utter lack of chemistry between the two leads in this series, with the leads in Jumong, Jewel in the Palace, Resurrection, etc.

One of the few greatest K-drama series ever made. Perfect casting, story line, acting, sound track. (The only thing I didn't like was the T.O.P. rapper playing NK assassin - this guy should take some basic acting lessons, but I nick-pick.) This series stands with Jumong and Jewel-in-Palace as the greatest of K-dramas.