I appreciated a number of things about it, but especially the amount of obvious research that went into it. Much of it was very similar to actual paranormal occurrences and the female lead's account of her experiences to the psychic were pretty much standard fare from a client.
Also, for what its worth, it was fun.
Having worked with a demonologist and experience with quite a few clients claiming all manner of "demonic" goings on, of course I have plenty to say about the subject. However, I can never seem to get past this question:
The first matter that always comes to mind though is their names. Psychics, clients, and demonologists always have names for these guys. Names like Elek, Akmarl