A fantastic film! It’s a movie that you must pay attention to the clues and dialogue between characters. So many people said they felt confused by the movie but as an audience member you’re experiencing the film in the same way as the characters. They don’t know what is really happening and they’re scared and confused throughout the film. So, why would the audience know more than the characters? If the film is considered from that vantage point then it’s a thrilling and uncomfortable experience. I loved it!