CHEMISTRY. This movie's got it. Kilmer and Downey Jr. riff off each other so fast and so frequently you barely have time to catch your breath between laughs, and yet all the rich, wry, witty dialogue is spoken with a succinct degree of conversational realism. Monaghan has serious ability too; I think she's generally been wasted on dry roles since this film.
It has a Bond-ian title, noir-ish plot, unorthodox narrative, and it's hell of a fun. very cool debut for Shane Black, and equally great performances by the charismatics Downey Jr and Val Kilmer and the sexy Michelle Monaghan.
This is not a comedy. This is not funny. The gags are dull. This is not a crime. This is not a detective story. There is no thrill. This is just boring. This is not a parody or irony. There is nothing behind. Yes, I know, on the paper "kiss kiss, bang bang" looks good and the ratings are high, but actually it's a bad movie.