It is clear after a few paragraphs that this is a good book. The content is written carefully and with a clear thought in mind. The content is logically structured and tries to follow the pattern of simplicity. Authors have utilized their insight and have tried to give as good overview as possible without going too much into specific implementation details as they are still likely to change. Still there's given very many details for example about the new GridView control and security features as well as about Personalization and Web Parts. And this is just a scratch to the surface. If it was known at the time of writing that some feature is more likely to change it is clearly pointed out. Also some additional features that we might expect to see in future releases of the product are covered in some detail.
If comparing to previous books of the authors when they were writing for Wrox Press, this book is better than their previous ones. They have now given more significance to explaining things and trying to give more space for reader's own thoughts which is good if considering reading the book as a learning process.