I saw this film had an average rating around 5 the other day, so I figured I'd chime in on it, because I think a 5 is a bit harsh. I enjoyed the film, it has some decent fight scenes, and the acting is fine imo. Yeah, it borrows a lot from Crouching Tiger Hidden Dragon, House of Flying Daggers, etc..., but I enjoyed the film regardless of that.
I really liked Ji-Woo Choi(who played Yeon Soha) in this film. She was great in the fight scenes and had a seriousness about her character that she portrayed very well. One thing I didn't like was some random oddness in the film. Could have been the script or it could have been the director, its hard to tell, but there were times where there seemed to be a comedy direction out of nowhere during some fight scenes and conversations and whatnot. I felt the film worked better as a serious drama, and the random comedic parts didn't fit in well imo. Also I felt the explosion kill move that is seen a few times throughout the film was a bit corny as well.
Anyhow, I think a rating of 5 is a bit harsh. House of Flying Daggers, Crouching Tiger Hidden Dragon, and Hero are three of my favorite films, and while this film is not in a class with those three, its worth watching if you enjoyed those three films. I think a 7.5 is a fair rating for this film, rounded down to a 7.