If you're like me, after watching roughly 3 billion similarly themed period piece kung fu and wuxia movies, you're relieved when a contemporary kung fu flick comes along. This seems to be Donnie Yen's bread and butter. Sure, he was excellent in Hero opposite Jet Li and even Circus Kids was entertaining, but his performances in those films just don't match up to SPL or this film, Flash Point. He seems made for modern kung fu.
I'll leave plot explanation to others as it's a pretty standard cop-on-the-edge film that seems to have been done to death by Hong Kong over the past 15 years or so. What sets this apart is Yen's phenomenal and somewhat unique brand of kung fu and, for the first time (to my knowledge) his surprisingly good jiu jitsu. The flashy kicks and punches are standard Yen affair, but it's a bit of a shock to watch him pull off a slick arm bar, arm triangle, or leg triangle.
Yen's performance is only strengthened by a very talented supporting cast. There's no push-over fights here...it's like everyone is really fighting for their lives. That alone should be enough to get you past a fairly overdone plot (it's not bad, but if you've seen it once you've seen it 1,000 times). It's definitely worth the 85 minutes of your time if you're even remotely a fan of the genre.