If you love the TV show this is a great podcast accompaniment. It's part recap and part behind the scenes. It usually features Dixon and McCaleb, Vince Gilligan and Peter Gould and then a couple of others, maybe the episode writer or director, or someone from one of the departments. Often one of the actors will be there too.
I guess it suffers from the same issue some DVD commentaries do, where it becomes a lovefest of mutual congratulation, but there's some genuine insight into the decisions made etc.