This review does not contain any spoilers.
As a born and bred Chinese, I have seen my share of Chinese Martial arts movies. The Reign of Assassins gave me the feeling of watching one of the great classics. It's story is not the most original, but it gives a nice background for the viewer to see the beautiful acting and action scenes. At times it's a love story at others a suspense flick with all the intrigue. The actors do a good job in conveying their emotions to the audience. Most of the characters get fleshed out, so your not only interested in the main characters. Story wise I have to say that some of the things were a bit confusing, but if you paid attention it all made sense.
The action scenes are plenty and well choreographed. The fighting was made believable, nothing was over the top. I especially liked how the action sometimes slows down just to show the viewer how things are done. This brings the action more to life and you actually notice all the small gestures the actors need to make in order to sway or dodge an attack.
Overall I liked the movie and I highly recommend fans of the genre to watch it. I surely enjoyed it.