It's a hard movie to review. It doesn't seem like it would be a romantic comedy/melodrama/martial arts/swordplay film when all summaries seem to describe it as a historical epic. Since it is a mess of a movie, I'll keep it simple.
Good: Solid Action, Great Climax, Good Actors, Good SFX, Decently Paced, Decent Costume Design, Good Plot
Bad: Not Enough Action, A Genre Mess, Overlong, Poor script leads to overacting, Poor editing and iffy direction/cinematography, Overdone SFX at Climax, Kind of Dull and Unorganized, Inconsistent Production Values, Messy Love story and lack of character development overshadow plot.
It's worth a watch, it could be a lot worse, but it is also not the best Korean movie you could watch this year.
Good: Solid Action, Great Climax, Good Actors, Good SFX, Decently Paced, Decent Costume Design, Good Plot
Bad: Not Enough Action, A Genre Mess, Overlong, Poor script leads to overacting, Poor editing and iffy direction/cinematography, Overdone SFX at Climax, Kind of Dull and Unorganized, Inconsistent Production Values, Messy Love story and lack of character development overshadow plot.
It's worth a watch, it could be a lot worse, but it is also not the best Korean movie you could watch this year.