The scene with the soldier (MAJOR SPOILERS)
So they've got her restrained in a glass cage controlled by electric shocks, but the soldier was just restrained? Surely if the demon that possessed her was so powerful, then the soldier should have been in a glass cage as well - what did they think was going to happen when the demon jumped from her into him?
How come she was so clean if she was consistently urinating? How was she being fed - we've seen that the shocks and gas affected her so Judith would surely have needed nourishment, she seemed as if reacted normally to the gas and shocks, despite the possession.
Also thought ending stole from Paranormal Activity. And why would the demon just kill Judith?
It's too cerebral! We're trying to make a movie here, not a film!