Well, Wong Kar Wai's movies usually appeal to the exotic taste, such as 2046 and In the Mood for Love. He is not known for martial arts movies, unless you include Ashes of Time (confusing to me).
This one is about some fighting sequences and a platonic love relationship between the two main actors; everything else is just fillers.
So if you're looking for something like Donnie Yen's version, please skip it. However, if you enjoy 2046 or In the Mood for Love, then it might work for you.
As for me, I pass. I do agree the trailer looked good, in light of what the master said to his protege earlier in the movie.