I think, in a way, the film short-changes itself by not coming down on one side or the other. As it stands, it's a framework for horror situations but cannot be anything deeper.
Best of all is Neeson, who is nicely creepy. Whether he's genuinely gifted or knuckle-chewing insane, he's not the kind of guy you'd want to spend time with, either way.
Neither horrific enough to scare, nor psychologically thrilling enough to even register a pulse. And whatever fun there is to be found, and there were hoots aplenty, it's of the "laughing at, not with" variety.