An extreme example of "your mileage may vary." I found it engrossing but never wholly effective; more power to those for whom it's both, lord help those for whom it's neither. I was most fascinated by the filmmaking techniques Ball uses to disarm his audience, creating patterns through minimalist filmmaking and repetition, then subtly breaking those patterns in a ways intended to subconsciously unsettle the audience. No traditional scary/tense sequence had me more on edge than the first time a shot dissolves into another after 20 minutes of rigid hard cuts, or the first time handheld is employed after exclusively using static shots. It's a film that comes alive in the details; it's up to you whether you're willing to search through the fuzzy, morphing darkness to find them.