Don't understand the high vote

Rating: 4/10 (14 January 2014)

The premise of this film is pretty cool, a bunch of backpackers trek down the wrong sort of cave and end up in all sorts of trouble. It's hard and first to tell if it will be a regular thriller or if it has a supernatural theme behind it, and the little sub-plot at the beginning (Sarah's story) adds a depth that keeps you watching.
However this has to be one of the slowest moving films I have ever watched. It's predominantly filmed in the dark with only torch-light or flares to guide the girls through (realistic but irritating), which ultimately kills the action somewhat when you're left thinking 'did I see that right?'
The characters in the film are undeveloped and there is no real sense of caring for any of them, and when it all goes wrong they are quick to blame someone else for the fact none of them prepared for what might happen. Juno is the woman who led them to a cave local authorities deemed unsafe deliberately on an ego kick. She is an infuriating character, demanding the others follow her lead when she is the one who got them into the mess in the first place.
It's at least an hour before the film gets going, with a couple of false starts that are not impressive. There is an element of suspense, but it is very weak and is strung out for so long I ended up thinking 'Someone just die already'.
All in all, a good Sunday afternoon film, but not worth 7/10 - a 4/10 at most.