I can perfectly understand why this drama is so popular: the brilliant cast, a really well written story of one of the most original kdrama screenwriters and quite rare in Asian dramas camp the war thematic. I really watched this drama with a great pleasure, only that thinking about it, firstly come to mi mind this adolescent love-story conception when a kiss acquires more significance when all the war. Or to be precise, when the love between lovers becomes so prudish that they, even after crossing the most risky situations, still feel to embarrassed to make love, as it were much more fearsome than all the danger they survived. And the most terrible that this prudish behavior occupies the center of the drama in like two or three episodes. It's too much, especially thinking about the age of the characters.
However, all other aspects of the drama were great. It's has a really interesting plot where even many supporting roles seem necessary (not all but really quite a lot). A war story is certainly a good material and here even the production is impressive and obviously expensive. The characters are really charming and the chemistry about the main actors (well, as we can see in reality... ;) ) is at the point. Song Hye Kyo is undoubtedly my favorite Korean actress because of her elegant expressiveness and here she's a real pleasure. I also like very much Song Joong Ki and here these two actors create a real field of charisma :D
Well, the soundtrack, unfortunately, can't be compared with that of Goblin but... the drama was fine... 9,5 :D