Most overlooked horror film of the last 10 years!

Rating: 9/10 (18 January 2014)

I can't believe this movie is never mentioned as one of the scariest movies of the early 2000s! Despite glowing reviews upon is release, it did not make very good money at the US box office. I guess it has gained a sort of cult status since then, but it's still very underrated and overlooked.
One thing I appreciate it that there is actual CHARACTER DEVELOPMENT! For once! Finally! We have characters in a horror film that we care about! These characters aren't just filler characters who are lining up to be killed. They have actual purpose and real personalities. Sure, the first hour might have been a little boring because it slowly took time to build things up and develop its characters a little bit, but it pays off later because the death scenes are much more tragic and the chaos that ensues was worth the wait.
This movie does not hold back on gore and violence, but it is as much as a psychological thriller as it is a bloodfest! The movie really plays with your mind since the setting is so creepy and claustrophobic. The fact that they are lost hundreds of feet below the ground in a cave they can't get out of is creepy by itself, regardless of the monsters that are chasing them. Also, you can't help but wonder- has the main character merely just lost her mind? Is she imagining all of this? This is a highly effective horror film. Very few movies scare the living crap out of me, and this is the closest horror film in a very long time that has come even close to doing that. I would highly recommend this movie to anybody who wants to see a good horror movie!