The movie itself is a haunting, powerful experience, much like the excellent Gothic thriller "Septien" and the short film "The Abattoir". These films are set in provincial towns, seemingly cut off from the world, and that adds to the suspense and mystery.
But check the discussion boards, I'm not the only one who thought the overbearing music killed the mood. The music itself was appropriate (jarring religious hymns), but they were just so loud and harsh that they distracted from the poetry of what was on screen. My advice to you would be to turn the volume down as much as possible while still being able to understand the dialogue. If you have it up too loud, I guarantee your neighbors will start pounding on the floor thinking you're starting a weird psycho cult and sacrificing first born children or something twisted like that.
Back to the movie, like I said above, it's suspenseful and mysterious. There's not a lot of action. In fact, basically there's no action at all. Instead you get a thick disturbing atmosphere, occasional dramatic flashbacks and unyielding tension building up. Very effective.
The DVD cover compares it to the Coen Brothers. I can definitely see some similarities with their serious side ("A Serious Man", "The Man Who Wasn't There"). It also reminded me of the 2005 film "Capote". If you like slow, heavy thrillers with interesting characters but not much action, give it a shot. Just beware of the loud soundtrack.