I love this film and found it totally enjoyable, simply because its a totally original, out there story, done in a simple extremely fun way. If this was a Hollywood movie, it would probably be dubbed "the Action event of the decade, coming this fall" and you would be sick of hearing about it by the time they actually got round to releasing it. Then to find out it was about as groundbreaking as double-sided sticky tape.
The two main charachters are perfect, and something Ive found in many Asian movies is that no matter how cheesy, cliched or corny a scene is, Asian actors/actresses seem to be able to pull it off without you cringing. Theres always emotion, without the stereotypical hero types we see all the time.
There is action and its well done, would have been nice to had a bit more but then would rather watch a film with characters you learn about and grow to like, than a story with characters you know little about, spouting out annoying "one liners" and performing gravity defying martial arts on anyone who "gets in their way".
All in all, this is a film you can watch over and over again, hate to use the term, but this is Pop-corn fodder. The sort of film home cinema was made for. Just sit back, forget all the stress and seriousness in your day and enjoy just under 2 hours of great entertainment.
...And Takashi Kaneshiro is fantastic!