Anytime anyone defends "the true gospel", they are defending the one that THEY believe to be correct.
This movie is well produced, however it is horribly biased towards a very twisted view of reality. The main thrust of the film is defending the idea of a tyrannical, psychopathic God with a multiple personality disorder who hates people and sends them to hell. This film is a desperate effort to stop the large movement of people finally recognising the sick nature of this belief system. The clock is ticking for these beliefs. Deep down conservatives know that people are becoming increasingly indifferent to this kind of Christianity, and they are having to bring out all the stops to try and prevent them from fading into history.
I can see why the evangelical and reformed community seems to love this film. That is because it reinforces the false security they find in thinking that only they know the truth, and that all other viewpoints are invalid. This will be incredibly comforting for those in the exclusive "saved" club. But for those who dare to think for themselves outside of a narrow, arrogant, and exclusive worldview, it will be disheartening and even laughable.
Those labeled "progressives" are poorly and unfairly represented, while so called "experts" are given a pat on the back for explaining "the true gospel."
To summarise, if you are an evangelical you will love this film. If you're not, you will be somewhere between saddened and indifferent.