Also, for some reason I just don't like to listen to this set while driving. I don't know if it's the reader or just that Tolkien isn't meant for driving, but I find it difficult to concentrate (not a problem I have reading the books, though).
You've got to think it was just an oversight that the recent UK law banning the use of mobile phones while driving failed to mention anything about listening to audio-books of The Silmarillion -- I know which I'd find more distracting.

Peter