As far as technical books go, this was one of the better ones. After 900 pages, I feel like I have a pretty good handle on ASP.NET, a language that I had no prior experience with. While usage is really the only tool that will solidify book knowledge, I now possess a lot more knowledge about ASP.NET than before, and I also have a great reference to help in my future development endeavors with the language. I found the author's writing style to be a bit more lively than many other technical books. Or, perhaps I'm growing more used to them.
The one area this book did not cover was Web Services. Web Services is becoming more widely used, and I was hoping to learn more about it. Apress offers a Pro-level ASP.NET book that I might also read through.
I am knocking a star off the book for the numerous grammatical errors found throughout it. I wonder if an editor even looked over the text.