The film tries too hard. It tries to be a behind the scenes look at Hong Kong action film making. And a thriller. And a love story. It also intends to give Michelle Yeoh a chance to play three very different aspects of the same woman. The film spends not enough time on the first theme and too much on the others.
That said, it is an extremely effective little film And more important: it gives Michelle Yeoh the chance to do some of the best acting of her career. She creates a wonderfully complete and charming character as a stunt double getting her big break.
The woman she plays is, especially in the first third, different from anything you have seen her do before. It proves that she is one of the greatest living actresses -- and not just in action films.