I bought this book because of all the positive reviews posted here. After reading past through half of the book (4 out of 5 chapters), I soon discovered some serious editorial and authoring inconsistencies and errors.
1. Typos plague the whole book from main text to Q&A - particularly true in the answer sections of the book where you need right answers the most.
2. Inconsistencies between text and Q&A. For example, the main text of Chapter 3 mentions nothing about BGP. All of the sudden, the Q&A has about 15 questions. (That's 15%!).
3. Serious editorial errors. In page 221, Table 3-7, there is a note for author that reads "Author: please supply table title". And the title says "Need Chapter Title"
These are just some of the problems I have been running so far. I will continue to read the book to the end though. The CD that comes with the book seems to contain the same questions as the Q&A sections of the book. The software engine is not as good as the one from Cisco Press in usefulness.
I learned some new things from the book (even though I am already a CCNP), but this book has a lot room for improvement. I really feel the author and the publisher are seriously irresponsible in trying hard to rush the product to market.