A New Kind of Science

Has anyone here read Stephen Wolfram's, "A New Kind of Science?"  Is it any good?

I got it for free from a friend who was getting rid of books, and I haven't done any more than leaf through it.  There's a lot of graphs and reference to 'cellular automata', and I haven't really studied any of it, but the consensus seems to be that it's a vanity piece which extends older ideas on Computer Science.  Amazon seems to have some actually helpful reviews on it.  If you're just looking to buy it for random cool stuff to leaf through, it's not worth it.