Seeing that this barely has had any audience I'm amazed how controversily it has been recieved in the reviews:
In my eyes the movie doesn't qualify as a horror flick, but it is a pure bred thriller. For most it might be a little rough to enjoy the storyline, as we're being dealt a missfit set of characters that are hard to empathize with. But it's exactly their consistency therein, that make this movie a fantastic gut wrencher. All sibilings deal with their childhood trauma in a unique way, that in itself forms a picture that the viewer might be able to puzzle together before its penultimate conclusion.
I'm quite sure that most people will be surprised how good this movie actually is, therefore I recommend seeing it.