Just watched this, enjoyed it a lot.
Basically it's Little Miss Sunshine...with a flesh-eating, people-spewing, amphibian monster.
I know it's from Korea and stuff, but aside from a few overly cheesy scenes, it's really amazing. Real characters, lots of panic, drama, comedy, violence, action, gore. The effects are pretty good too, I mean, it's still obviously CGI, but done well.