There is not much more to add to mrblues review, which i totally agree with!!

But my critisms for me is this feel liks a pro triad movie? WHY?
SPOILER : the ending says dont let distrust effect your group otherwise see what happens, you fall apart. UNITY is the best. Also if your a undercover, the police force will keep you forever and manipulate you so you can't trust them. Well thats the message i get anyway

There is a little bit of black comedy added to this movie, which actually doesnt disrupt the flow of the movie or change the fact that this is mainly a serious crime movie

Its good to see Miu Kiu-Wai in a movie also