If I were to score this movie with the sound on, it would be closer to 2 or 3. The story itself is not completely stupid, but the way this movie goes about telling it is profoundly dumb. The characters are very one-note and flat, including the "tough guy with a heart of gold, who can fight like the best black-belt master."
Having said that, the fighting isn't bad. I'd see this again on mute, while listening to my favorite "Trap Nation" mix. If I had to watch it again with sound, I'd pass on the experience.