I wasn't sure what to expect when watching this film. I am glad though that it is not packed full of action and violence, this is an intelligent film which will keep the viewer hooked till the end credits. The end climax was amazing, I'm not wanting to go into detail as I may spoil something. All I can say is that if you are a fan of Asian cinema then you'll love this. Just don't expect gun fights from beginning to end.

Masterfully directed this film really manages to capture the tension Lau and Jeung are under in their undercover roles. The characters are three dimensional (much more so than in the Departed; which i found disapointing after having watched this previous) and the acting is very very impressive; no need for over the top amateur dramatics here.

Check it out. The good news is the sequel is just as good.

I love Asian movies and have i quickly growing set and though i do like some of Asia's all out blood bath movies like Battle Royale and co. I also like it more cultured side 2 like this movie, ghost in a Shell and so on. This will really show you another side to their movies and that it is not all pointless killing.
This movie is a Intense and clever detective movie with lots of brilliant twists and turns. A must see for movies lovers of this type. Though you may find you can get lost at times and it is not for the faint hearted movie watcher or someone who wants just a pointless violence movie (if want that then, i think Battle Royale or Versus, will fit the bill) Also have to say, i think the Departed is actually a very good remake and will help you understand this movie's storyline better.