I am pretty sure in South Korea this movie will score higher than I rated it. When it's in your own language it's always easier to follow. And Korean is not a great language to listen to when you're not understanding it. It's sounds like they are always angry when they speak. The movie is nicely shot though. But the major problem I had with it was that it was too long and it took a really long time to become interesting. You could easily cut out the first hour of the movie where nothing major happens. I started getting bored actually. But the second part of the movie is way better, I would say from about where they are in the train. If the whole movie would be at that level of intensity I would have scored it higher. Most of the actors were good, some a bit lesser. All in all it's worth a watch. From the Asian movies I watched the Koreans are for sure the best ones.
Review of The Age of Shadows
