Comet, Butterfly, and Sword (also known as Butterfly and Sword) is an interesting movie. It features Michelle Yeoh (Crouching Tiger Hidden Dragon & Tomorrow Never Dies), Joey Wang (City Hunter), Tony Leung (Hard-Boiled & Gorgeous), and Donnie Yen (Highlander: Endgame & Once Upon a Time in China 2). The acting and direction is well-done, considering the usual Hong Kong action movie. Michelle Yeoh turns in a good performance (but not as good as Crouching Tiger Hidden Dragon), and she manages to look gorgeous and intimidating at the same time. The action is constant and moves at a rapid pace. This movie is definitely not for those with a weak stomach because there is a lot of blood, flying limbs, impailings, and other sorts of gruesome deaths. The martial arts action is sometimes hard to see because of the direction, but that's what makes it look like such a frenzy. There's lots of wirework and other unbelievable stunts like that.
I did not like the movie for a few reasons. This movie is really for people that like these kinds of films. Personally, I tend to like lots of martial arts movies, especially those with Jackie Chan, Sammo Hung, Yuen Biao, Jet Li, Michelle Yeoh, etc. I loved the cast, and I thought they did a good job in this movie. However, the action is what got to me. The movie has too much wirework (or wirefu) and blood. If you enjoyed movies like Yuen Woo Ping & Tsui Hark's Iron Monkey, Jet Li & Michelle Yeoh & Yuen Woo Ping's Tai Chi Master (aka Twin Warriors), and Michelle Yeoh & Anita Mui & Maggie Cheung's Heroic Trio, then I think you will enjoy this movie. If you are into those kind of movies, you will love this. However, if you just want to see it because it is martial arts, and this is not your type, then obviously don't get it.