While I'm a fan of Kevin Smith, I can't say that helped in watching this episode. There was a few additional interviews that were cool to watch (especially the one involving his wife) but it was basically a recap of all the information that most Smith fans would already know.
The highlight of the episode came when the cameras followed him at Cannes Film Festival. That footage was worth wading through all the redundant info on his life and films.
This episode was interesting to leave in the Smith libarary, but was mostly directed at those with just a simple interest in his life. Die-hard fans will like the festival coverage, and new fans might understand a little more about where he came from. It serves as a introduction to his life, so yeah, it's good for those who didn't know before.