Absolutely worth the money! And, it fits in nicely with other current Zombie flicks in your library. There is a lot to say about it... and gosh darn it, I'm gonna say it!
First off, you can change to English dubbing, so the movie plays out more smoothly. But... you shouldn't. The better way, is to watch it with the subtitles, you'll gain more incites out of the scene. You can always pause, hop back to re-watch a scene or re-read the subtitles. Listening to the language will help you sink into the novelty of watching a Zombie attack in another country.
Quick mention about the politics and it is important to say it... Don't get South Korea mixed up with the irrationality and dementedness of North Korean politics and its hostility towards... well, everybody. South Koreans are a beautiful people; amazing culture and art, great work ethic, and a legacy of moral integrity and sophistication. There is a national sadness about it's past--if you've read their history, you'll understand why--but there is an unbelievable hope for the future.
I am not Korean, not at all Asian, my families are of European and Eurasian descent. But along the way I fell in love with Korean culture, especially after sampling some of its finer cuisine... Korean Girls! Just saying, this is how I happened upon it, and how the culture thrust itself onto my psyche.
What would you get... if you take a selfish, work driven businessman with his incorruptible, straight-edge daughter... a hefty, working class hero-to-the-people with his impertinent pregnant wife... a high school baseball team on it's way to a game, while one of its players smuggles along his wanton girlfriend... and put them on a high-speed commuter train filled with a buffet of varied passengers, while a laboratory catastrophe disguised as an industrial accident unleashes a plague of zombies?
If you know anything about Zombie movies and Korean culture, you'll guess the answer. I found it predictable, but I loved it all the more for it. The story can take you only in one direction, it is a train to Busan, after all.
There are plenty of great Korean movies... but it's Korean television shows that take the prize. It's like watching a Japanese anime, only with living, breathing people. If you get a chance to do so, check them out. There are a couple of really great internet sites that let you watch past Korean television shows for free. A lot of good people put a lot of hard work into the subtitles, they deserve the credit.
Get used to watching with subtitles!!! Hearing the Korean language, despite not understanding it, adds flavor and emotion to the writing. You gain a more three dimensional view of what's happening on screen. Soon you'll be picking up not just the words, but the manners and particulars of the culture.
As a starter, look up the following shows until you get a better feel for what you like. If you get hooked, soon you'll be searching for Korean made movies. I come across them all the time at BestBuy, and shocked at their availability. The website you'll appreciate in this respect is called Viki. The titles of the shows do change from country to country, but you should be able to get the basic idea anyway. Try these shows... 'Dream High' and 'Dream High 2'... 'Panda and Hedgehog' ... 'Love Rain' ... 'Flower Boy Next Door' ... 'Coffee Prince' ...'Hi! School: Love On' ... 'Big' ... and 'Iron Man' Oh, this last TV show goes by a different name in the United States, obviously why... you might find it also known as 'Blade Man'
If this matters to you... these shows, mostly, that I've listed... are very much chick-flick type shows. But, worth watching anyway. You'll understand why, if you get hooked on them. There are hundreds of shows from every genre, but these are a good starter. I hope you try them out, and enjoy!