It's great to have the context from Elizabeth Smart herself in this movie. It's also really good to appreciate a bit more what she went through and how miraculous it was that she not only survived, but is mentally fine after all that abuse. Obviously, since Elizabeth herself is narrating the film, you can be sure that everything in the movie happened and nothing was needlessly dramatized.
However, from a filmmaker's standpoint, it could have been a bit better. They could have skipped back and forth between her point of view and that of her parents' to show their efforts in trying to find her and the developments that were going on outside her campsite. They didn't even explain how the police knew to find her (her sister remembered the voice of the suspect and they tracked him down).
I also don't like how through narration Elizabeth seems to try and justify all her actions throughout the piece. Does anyone doubt that she wanted to stop being abused? The film almost seems like a reply video to a bunch of people that question why she didn't yell for help. I dunno. To me, it's obvious and was forced a bit much, but maybe that's the audience Elizabeth was wanting to address in particular.
Overall, a great documentary of the kidnapping of Elizabeth Smart. Cinematically, it could have been improved, but it did the job for the purpose it was filmed for.