After the movie you might think
that's it?
I don't think they movie is trying to be like Paranormal Activity(ghost torments family). Instead they movie leads you along with the mystery of what happened to Alice, and what unfinished business is there that made her come back.
You get false leads with, is it really her body thats found, hoax footage, the swinger neighbors, the paranormal expert, etc.
The real truth to this movie is that you or a loved one can die at any moment. If that happens would they know the love you shared eachother?
The most emotional part of the movie is when the mother talks about how much alike she is to Alice. You can see the mother and the daughter move the same way in their home infront of their window. The movie then talks about how they both are private people and keep to themselves.
At the end of the movie you see the session with the medium. You see that the mother and daughter share an experience about being in the room with eachother after Ali's death, but the mother can't feel her daughter's presence. Maybe its the privacy the mother and daughter both shared that didnt let them share a paranormal moment in the future. Then it's apparent Alice came back as a ghost to see her family because she misses them.
I'm sure any parent made sure to hug their kids after watching this movie.