This film gave me exactly what I was looking for--but it may or may not be what people are expecting.
First the production value is very good. The recreation scenes look like they are straight from a big Hollywood movie--the acting, sets, and lighting is excellent.
As a college professor, I can tell that it was very well researched and very thorough and thoughtfully laid out. I was hoping to get more practical and real-life information about the topic of exorcism and demonic possession without the typical Hollywood spin you see everywhere. It has become so difficult to distinguish what is real and fiction in regards to this topic that I have been hoping for something to explain it---and this film really does.
It is a bit academic at times but that is broken up by excellent dramatic scenes, so it held my attention to the end.