Moria has a positive review. Rolling Stone says it's one of the "20 Scariest Horror Movies You've Never Seen". Empire Online says it's "Brutal, bloody, terrifying, astonishing... And so tense it'll leave you aching."
Roger Ebert says, "Finally, a scary movie with teeth, not just blood and entrails -- a savage and gripping piece of work that jangles your nerves without leaving your brain hanging" and describes it this way: "The titular drop refers to a cave-diving expedition undertaken by six women, but it's also a breathless plummet into the abyss where nightmares are realized, a descent into primal chaos and madness."
DVD Talk says, "this movie works" and calls it "a damned fine flick". Rotten Tomatoes has a critics score of 85%.