Driven mostly by the initially intriguing concept, this film surprised me by resolving this around this mid-point of the film. Not having read the book or really heard anything specific about the film, it did catch me off guard in a small way, since I had come into the film with the specifics of the situation in mind. The first half of the film does make it more than this though, because I was drawn into a relationship which was emotionally raw and compelling. The film uses the limits of the room really well, focusing on the mother/son relationship and making us care about it while also being horrified by the specifics.

The second half of the film manages to maintain that engagement, while flipping the characters in such a way that made the drama work in a much different way, and cast a different light on the first half of the film. It is tough in terms of subject matter, but at the same time it is easy to watch because of how well the film draws you into caring about the lead two characters. A big part of this is how well both Larson and Tremblay delivery; they are organic and natural performances, and are supported equally well by the likes of Allen and Macey. The writing and the performances make it, and in the end the film is a lot of heart and works as a result of this.