Well, OK, I've passed my test a couple of weeks ago. I've had two books: this one and the compulsory Second Edition of whatever - you know, the official textbook.
This one... It says in the foreword: do not memorize the questions because they change all the time. Sic! In fact it is a lame excuse along the lines of 'we ain't got no idea what the questions are, but we'd like to cover our backsides'. This is utterly true: not a single question in my test was ANYTHING like the ones in the book. So basically what they've done, they've taken Chapters 2-6, picked the factual info and then asked questions about it. Do you really need somebody else to do it for you?
Second point is, the website is a joke. A rather sad one. The 'extra' test accessible for free on the site is just a dozen of random questions from the book. To get more tests you need to pay - not a fortune, but something comparable to the price of the book itself, and since I am too tight to be rid of my hard earned pennies in such a ridiculously unscrupulous way, I don't know if there are any original questions in the 'extra' tests, or is it all a repetition of the same stuff.
Third, there are factual errors in the book - me and my mrs. have spotted at least two (about licencing for young folk's labor and something about the EU's founding members), which is a bit of a mauvais tone for a test preparation manual.
So the book is pretty useless. On the positive side, it's cheap, but then again, caveat lector: factual errors can trip you up, so take it with a pinch of salt.
Official blue book is a must.