I can't understand why is this drama so underrated with only 2 reviews.
I didn't expected to like plot or FL, started only because of Kim Jae Young (and secondary romance), but story is really really interesting and intense. it's rare case when story isn't dragged and I even think more episodes would be perfect.
it's not usual female centered drama, it has more to offer. there are events and actions by character which make you think about human nature, think about fact that your actions are returning to you, revenge often is more painful for them who submits it, because if you go to the war, you should know there's always things and people you can loose.

Plot is really interesting, often quite original (which is rare in dramaland); yes, there are some plot holes but most of them is because in 16 episodes there are soo many events, character developments (some characters in fact didn't change but we saw more and more layers of them).
Characters, as I said are very interesting, not primitive but complex and difficult, realistic... you may like them or hate, but they are good and interesting as characters, very well written. I didn't wanted to be interested in FL but she and her story is interesting! how she makes people hate or love and be extremally loyal to her. Park Hee Bon was only annoying character for me.
Male characters (2 main) are also very interesting (in female centered drama, they are still and maybe with FL most multilayered characters), I could feel for them, their pain, their love and loyalty...
Acting is also very good, very natural, you know.. when acting and directing together make you completely feel/understand characters.
Music was also really good and correct! Cinematography beautiful and directing great!

definitely recommend! it's an intense, interesting story with good amount of romantic vibe and love.