Any person that has watched vintage kung fu movies knows for a fact that it is extremely difficult to come up with a plot that is coherent or remotely credible. In what world do men need to fight on a constant basis? none. But RZA manages to create a story that manages to put several opponents against each other, which I thought was incredibly smart. There are other martial arts movies out there with smart plots (Hero, Ip Man, etc.), but let's face it, it's not the easiest plot to write.
It brings back vintage kung fu with it's classic visuals. Little CGI and no green screen (at least it was imperceptible to me). The choreography could have been better (2012's The Raid was particularly impressive) but it was still cool to see some very particular techniques - like X-blade's, the gemini's, and Lucy Liu's fighting styles.
The costume design was very good. A lot of Kung Fu movies nowadays have tried to avoid loud costumes, to avoid the whole Power Ranger's look, but I thought the costumes in this movie were awesome.
A lot of overacting - as it should be - just like vintage kung fu movies.
The Soundtrack is awesome - but I would have enjoyed it more if it had more Rap.
Kudos to RZA on his debut movie. Hope he filters out some mistakes and squeezes out some more movies.