Worth the money. The book was one of the first really well-written books that I read as part of the CS curriculm. All the material we covered in class was there, all understandable before or after class. I used it for another class's open book midterm. Good senses of humor.
Ideas are illustrated well, tangents are in moderation and always either relevant or interesting.
The way the chapters relate to each other and the theme of intelligent agents develops from one chapter to another makes the book flow well and makes the entire field seem more organized than I had ever imagined. I think it's the best Comp Sci book I've bought. Comprehensive, easy to understand. The book is very enjoyable to read. I often found myself laughing or smiling at their examples and comments.