Interestingly, half of the comments listed here state this film is a complete disaster and the other half call it an action masterpiece. The film is neither of these extremes and its quality really is a compromise of both stances.
The begin with, the story it tells is rather straight forward with a typical flow of narrative we have seen in several other Asian thrillers. The story, however, is not a complete carbon copy of these other films and does have its own unique flavor, but the similarities can not be ignored.
What does set it apart from these other Asian thriller is the way it is told. The film is disclosed in a terrific and unique visual flair. The film features some savvy cinematography and flashy lighting to really add a wonderful ambiance and atmosphere to the proceedings which does help elevate its otherwise mundane plot.
The narrative also is infused with a good amount of comedy, causing the film to operate more as an action comedy rather than a straight action thriller. However, this is both to its advantage and disadvantage. The comedy does add a refreshing spin on the genre, making the film feel fresher than others of its ilk; but the comedy and serious violence is presented too unevenly making the film have a crisis in identity. At one moment the audience is expected to laugh and the next we are to cringe at the intensity and brutality of the action. This leads us to assume the film wasn't quite sure which direction to embrace.
However, the acting really is a key point that aids in its overall success. Anthony Wong is on hand to give another terrific performance. Many critics cite this as one of his best roles, if not the best one he ever had. The reasons are quite clear as Wong can both exemplify a tender heart in softer scenes and a determined, vengeful soul in harder scenes. On account of his performance, some of the uneven issues in tones are brought to an equilibrium, but are unfortunately not entirely resolved.
The acting form the supporting cast are adequate but nothing noteworthy. Some of the performances are rather over the top but that seems to be often the case in Asian thrillers, The rest are fortunately competent.
Overall, if the script had greater focus and didn't conform to several conventional elements, then this film would have been one of the better thrillers to come out of Hong Kong. As it is, the film is a rather typical action thriller told in an invigorating manor. Recommended for anyone interested in thriller genre, but if you are a causal film viewer or if the genre isn't your forte, then there are better examples out there.