The downloadable code is very well organized and usable. All the code in the book, and there is a ton of it, is available.
The book is very well written and makes for a really good read as well as a great reference. It is in depth and very thorough.
All in all I think this a great book. It will be on my desk for the next few years until I need to replace it with the 8th or 9th version.
If you are a web developer, you need this book by your side.