An interesting story, though a little predictable.
The suspense was upheld throughout the movie, and there was real tension in many scenes, accomplished through a nerve-wracking score and drawn-out scenes that got my teeth grinding.
I immensely enjoyed the cinematography and effects .. it created a dark and brooding atmosphere that had me mourning the conclusion before it came about.
The acting was fairly good, no real complaints. I especially enjoyed the hotel concierge character, who added an old-school feel to the film.
Overall, I definitely enjoyed the movie, although I found the story to be almost too simple for its length; it felt like a short story stretched to fit a feature length film.