The only problem i found about 'Thirteen Ghosts' is that it is not scary. It has the elements to be a horror movie, the ghosts, the gore, but it is not frightening at all.
So this film can be a real party pooper if you're watching it with the lights off at your girlfriend's house waiting for her to grab your arm through the hard scenes, or expect to enjoy having some nightmares about it. But, omitting that--yeah, i know it's hard to omit that a movie labeled as 'horror' is not scary--, i judge it as a very interesting film. The production design is great; the glass house is a state of the art, away from your typical haunted house, looking both luxurious and somehow creepy at the same time. That innovation, carried out with such a splendid result, is worth my applause. So is the decision to make the ghosts be real actors in the set, not digital freaks. Human monsters, even if having to go through 4+ hours of make-up sessions, even if having to use a double amputee actor to play a particular ghost, are the film's best trump card. There are good ideas in this film, and they're very well developed. It doesn't deserve a bad score.