I've been a George Carlin fan since my teens and have enjoyed both his stand up and his occasional movie appearances (especially with Keanu Reaves). This book is classic Carlin, but it reminded me that too much of a good thing is, well, sometimes too much. Listen in small doses and it's brilliant. Go for a half an hour, and it's ok. Go for an hour, and the pieces of the book(s) which are dated really become obvious and annoying, and his with is less effective.
The best part of the book, though, is George's narration--given the way he wrote, it is hard to imagine anyone else doing an even adequate job. I would buy this book again, but I'd be a little hesitant to recommend it to a friend--too many other good things out there.