First, I passed both LPIC-2 exams, even scoring 100% on 117-201 and 720/800 on 117-202 (53/60 questions correct). I've been using Linux for about 10 years now, and have been a Linux Systems Admin professionally for about four. This book is great, I read Roderick Smith's Linux+ book (LPI version of the exam) which is also an excellent book, so I had no hesitation buying this book. Reading this book alone will not get you to 100% of what you need to pass the exams, practice and experience is whats going to get you a good score. What I did was read each chapter and then if I did not feel 100% about the subject in that chapter I started researching the topics covered, and investigated further about those topics, I also built a home lab utilizing virtual machines running on top of Fedora 15 (yum groupinstall Virtualization) so I could build a bind dns server, a apache web server, a squid proxy server, sendmail/postfix mail servers, etc. I rarely had to do more research on the first half of the book (first exam topics) because the vast majority of content I knew in depth (hence the 800/800 score), but the second half I spent some time on and learned a lot. Overall its a great book, and I'll continue to use it as a reference.
Minus 1 star for the price tag, especially the Kindle price which is what I purchased, $40 for a digital book is a bit much in my opinion.