How often did Jesus teach in parables? We are told why he taught in parables. We also know that we are all at different maturities in our faith.
That being said, I ask this:
How many convicted believers will be led astray by this movie? None.
How many who don't know God at all may be led to ask about him? Countless.
How many who don't know God at all will be let to NEVER ask about him? I doubt any. This was a non-threatening film in so many ways.

The trinity will NEVER be understood by anyone until we are called home. And as convicted as I am in God's word and as much as I appreciate the fact that there are people willing to take the microscope of analysis to movies such as The Shack, we can't miss the fact that this can be a fantastic tool used to begin reaching those who are seaking who God is. And perhaps they are seeking BECAUSE OF this movie. How will they react when they come to us asking about God and we tell them how non-theologically correct this movie is. Personally, I wouldn't want to talk to you anymore.

I was very skeptical and I did not make it through the book. Being more visual, I went with my wife. Yes, the characters took some getting used to, but after putting my LCMS hat to the side to enjoy the movie, I thought it did a really good job of putting a visual picture of the impossible-to-understand. I'm taking my kids, because I trust my ability to teach them the Truth above what Hollywood does.