I'm glad I gave the movie a chance given the low ratings. It wasn't a zombie movie (as others have said) but a psychological thriller, a journey into the recesses of the human mind. I admit it was boring at first, but I quickly became intrigued with the concept. I soon realized that things weren't necessarily as they seemed (or were portrayed). I began questioning what was real, and what might have been a figment of Kim's imagination. For a film taking place in a single setting with only two characters, it managed to keep me guessing and wondering until the end. I think people always expect constant action, thrills, effects (often to the detriment of the story and the characters) and simply can't deal with anything deeper, more thoughtful, more intricate, and dare I say it - more subtle. I prefer suspense to action and gore any day of the week, and this film delivered. If you are someone open to a slow, interesting build rather than all flash and no substance, you should give it a shot.
My ultimate summary statement would probably be something like - "What goes on inside your head can be far scarier than any outside threat."
My ultimate summary statement would probably be something like - "What goes on inside your head can be far scarier than any outside threat."