If a reviewer found this book useful for preparing for a Microsoft test, then judging from results, it must be a useful book.
I found it, however, to be inaccurate in chapter 6, when it discussed how to cluster DHCP & WINS.
Moreover, having created a real cluster on the basis of research in other Microsoft materials, I don't see how anyone could actually understand, from this book, with its overly concise and telegraphic descriptions of cluster activities, how even something as basic as disk groups work.
I hate the way the authors just dump terms like "domainlet" (page 7 & 35) and "dumpconfig" (page 147 & 148), neither of which is mentioned more than once, into the text and expect that the readers understand them.
I hate the way, as in almost all Microsoft training kits, one passage contradicts another.
I hate the way it seems as if the Microsoft Training Kits are written by flunkouts from remedial English classes.
A good example of this is Kay Unkroth's "Microsoft Exchange Server 5.5 Training Kit." This person isn't a native speaker of English, considering her bizarre sentences.
Moreover, that book is poorly proofread with obvious grammar errors scattered through it.
I do this stuff for a living and poor quality just ticks me off.