I did not like this movie and that has nothing to do with the fact that i read the book.This movie is a failure because the director failed to capture the notion of hysteria. What you get is small amounts of confusions.The story is about the unknown, and confusion would mean that people are not sure about certain things. Following what the SPHERE is supposed to do and be, everything is possible and anything can happen. There should be hysteria.The movies makes attempts at greatness, but falls short because of minor issues. For example, toward the end, three survivors are being held for debriefing, and you see the sub-title Day One on the screen. For affect, shouldn't it say Day three. Then the viewer would think, wow, three days, in a room, with nothing to do, wow. Instead, we see, day one, and then the movie is over.