The film deals with thoughts on religion, Catholicism mainly, in a way that pokes fun at the institution but does not deride it. Dogma is by no stretch of the imagination an anti-Catholic movie. It embraces religion and points out the potential and actual problems that can occur within any religious institution. The film's comments and contents are definitely meant to be taken with a grain of salt.
The cast is great and there are many instances of hilarious viewing, usually Jay and Silent Bob, as well as very sensitive and expressive moments from the various actors.
In the end, Dogma is a thoroughly fun and thoughtful viewing experience that both old and new fans will enjoy. A movie outside the typical fare that is worth spending your money on seeing.