I really enjoyed where this movie went. It started out seeming like your average film about a haunting. Family gets spooked by ghastly encounters and they hire someone to take care of their problem. At this point, the movie starts to be kind of funny - and not just because of Mark Proksch. You actually encounter two medium-types and they are very different in their approach to the problem in goofy ways.
Once the main characters settles on Mark's character, Os (the "medium"), things become horrific and not in a haunted house kind of way. There are lot of red flags with Os hanging out in the house as he really opens up about himself. This movie reminds me a lot of Creep in that the horror is in the psychology of this character who is initially too weird, then too close, and then too uncomfortable to bear.
The ending has a very serious explosion of intensity that is worth it. The conclusion is untidy and feels rushed but leaves enough for you to chew on and discuss with friends after. I will say the ghosts aren't what they seem. And neither is the evil.
I highly recommend this movie to fans of Creep.