This movie in a Bible study
This movie is a perfect base for a bible study.
In the book Finding God in the Movies; 33 Films of Reel Faith by Robert K. Johnston & Catherine M. Barsotti you can find a complete chapter dedicated to this movie!
I would guess that it's only good in churches that aren't highly dogmatic. The movie is more about existentialism than dogma.
The fundamentalist church I grew up in would HATE it (I suspect). I'm now attending a more "liberal" church and I think they would enjoy this movie.