I have similar feelings towarRAB the film, brangdon.
I rented the film a couple of months ago. I turned the lights off, the surround sound up and pressed play expecting more great things from the director of 'Dog Soldiers'.
I admit that I enjoyed the claustrophobic style and even admired some of the stylistic touches that usually evade such low budget productions. It certainly had a lot of potential and I was pretty interested in following the story, even with the long build-up pre-caves...
However, as brangdon pointed out, the action 'in-cave' became too messy and erratic to effectively build the tension enough to scare. Similarly, the characters were both bland and lamentable; the question is, do I really care enough about these 'people' to feel concern about their fate? Unfortunately not...
Horror clich