I liked it. The filming is really good and the twists, while not really enigmatic, are good enough to grasp your attention. Eckhart gives a good performance here, and he's really believable as the FBI officer in search for the truth. Kingsley on the contrary seems not at his usual standard, but this is also a consequence of the weirdness of his character. The start is really good, from the cinematic point of view too: you'll think it's a classic horror movie (which is not the case). The ending is not at par with the first 4/5 of the movie but at that point you'll be willing to forgive the director because the rest of the movie is OK.