Perfect!

Rating: 10/10 (9 September 2013)

This movie had me totally freaked out even before the real action started. It's been instantly relegated to my top horror flick list as well as my top movies with female heroes in it. It's not for the faint- hearted or weak-stomached and if you're claustrophobic (like me) you will struggle with it but persist!!! It's more than worth the effort. Superb direction, cinematography, acting and music.... everything in this is absolute top class! Shades of Alien & Predator amongst other things, one of the coolest things about this film is the wonderfully drawn characters of the female leads. One of the reviews here draws out the "hidden" story in this movie - relating to Sarah's subconscious which I really liked. I'll be watching the movie again with that in mind.
Reading the negative reviews here I can only assume they watched a totally different movie or went into this one determined to dislike it despite how brilliant it is (for some unfathomable reason!!). Created before The Cave and infinitely superior to it, this is about as FLAWLESS as horror movies get.
Watch this, it will restore your faith in the horror genre.