I'm sure you know the story by heart if you are looking at this. What separates this collection of NPR radio dramas? The production is fantastic, even if only a couple of the actors are the 'real' ones in the film. The depth this adds to the familiar story is what makes this stand out. The first two episodes of the thirteen take place before the film opens. A lot of extra dialog and description too. Not only does Han shoot first, he is a very dark character only redeemed by his heroics at the end.
My only other comment is that I would rate it PG. The film has a few curse words, and this production adds a few. There are also sections that are fairly dark, such as Vader's interrogation of Leia. If you have a younger Star Wars fan I don't think I'd recommend this one.