The Devil On Trial might be interesting for people that liked The Conjuring. I'm one of them that enjoy that kind of stories. Do I believe all those things really happened? To be honest, not really, and this documentary turns more towards that way towards the end. Overall it's well made, the re-enactment looks believable, but I doubt that The Warrens are what they say they are. To me they look like conmen in this documentary and because of that all The Conjuring movies look more unrealistic from now on. The Devil On Trial is just for people that like easy entertainment, in this case a horror story based on true or false events. That's up to you to decide.
Review of The Devil on Trial
