I'm a conservative evangelical Christian (a Calvinist in fact), and I am not exactly proud of this movie.
At times, it was actually kind of entertaining - mostly because of the laughably bad writing, but near the end there actually were some dramatic moments that affected me. Plus, sometimes I couldn't help but get caught up in the cheesy fun of watching a movie so clearly directed at members of my own community.
But overall...? Yeah. This movie had a LOT of problems, and frankly it was offensive in a lot of ways. And to be honest, it doesn't reflect very well on believers.
I think that the entire thing is supposed to teach Christians how to use apologetics to evangelize, but if that's what it's trying to do, don't expect a huge influx of converts anytime soon. The entire movie seems VERY caught up in how stupid, evil and bad non- Christians and atheists are, without stopping for one minute to recognize that HUMILITY is one of the key virtues of our faith. In truth, Christians are literally NO better than other people, and whatever difference exists in our life is not because we're smarter or more moral - it's because of Christ and Christ alone.
This movie is nothing more than an amalgamation of clichés and stereotypes that us Christians unfortunately have. It doesn't put a modicum of effort into thinking about or developing its story or characters because the story and characters already exist in the minds of the Christians watching.
As a result, the characters are all flat and badly written. Their motivations oftentimes don't make sense. They feel like total non- entities, mere objects upon which the writers rather un-subtly impose their views of the world. This is BOTH bad writing AND vastly weakens the message.
This movie, because it contains nothing that feels like "real people", has limited relevance to the real world. This is basically the movie equivalent of a kids' educational video - it may have vague outlines of characters and plot line, but they have no depth to them. The entire thing just exists to teach something in an entertaining way.
And that's actually perfectly okay. It's not exactly what I'm looking for in a movie or a Christian movie, but it's not inherently bad. I just wish they had done it in a way that didn't further prejudice and shallow understanding of other human beings.
EDIT: For the record, I am no longer Calvinist; as of 2019, I converted to Orthodox Christianity.