I thought the film was okay and definatley watchable.
I tend to fall asleep watching late night films but I managed to keep awake for this film as it was different and had a few good gory bits.
I liked the mobile phone bit inside the ruin, hadn't clicked on untill that point lol.
The ending was quite good I thought, sets it up for a sequel maybe, wouldn't watch it at the cinema but may rent it.