I know, another boxing/martial arts movie, but this one came at it from a different angle. It's not giving anything away to say (since it's in the previews) but the two brothers end up facing each other in the finale tournament.
Tom Hardy is the standout talent for me in this one (as he displayed in "Inception" and I'm sure will again in the upcoming "Dark Knight Rising"), but really isn't challenged that much here by a necessarily one dimensional role. The movie is very impressive up until about half-way through the tournament when the against impossible odds goes over-the-top along with other unlikely situations and dialogue.
Honesty compels me to report that most of the audience I saw it with appeared to enjoy it at a higher level than I did. And even at that, I'd still have paid to see it.