Yeah it was a really special experience for me too. My brother and I were looking through the Netflix catalogue last night deciding what to watch. My brother was attracted by the poster design and although he didn't care for the subject (picture of a nun) since he is a pretty strong atheist, he chose it anyway which really surprised me.
My brother is a Fine Art graduate and he really enjoyed the cinematography of the film. He watched every scene contemplating the story, the subjects, and finally I think the ending really surprised him and affected him in a real way both logically and emotionally. He has been questioning why I decided to become a Christian 3 years ago and after the movie ended I was able to explain to him a lot of what my faith was about. I think it was the first time that he finally understood where I was coming from. The film was really helpful in this regard for which I am really thankful to the director/producers for.
It has become a pretty special film to me and I think this will be one of those films that I will watch may be 1-2 times every year.