The first half of this movie is incredibly effective with the concept of a bunch of teenagers having a real medium to communicate with the dead and filming themselves use it just for a laugh. Then one of their uses of the medium goes too far and problems arrive, that is great stuff.

But everything that happens after the possession gone awry is a bunch of predictable nonsense. It also doesn't help that the main character is so unlikeable and selfish that you don't care whether she lives or dies. It is not properly established if she is being controlled by demons but that's the only thing that could excuse her terrible decisions which could have just as easily been driven by a selfish desire to speak with her mom above all other peoples safety.

I didn't hate watching this but the potential was there for something great and it was just not executed well at the half way point.