The book can be safely be called a giant ham, but reads well and is mainly from the presentation / structure very catchy. The considerable size of the book is based in part on the many repetitions of work instructions or techniques. In this way, but achieved that after reading also guarantees everyone (!) The techniques has it. I also advise urgently to apply these techniques, even if they sometimes appear strange or seemingly self-evident. You will see that you can use it well (especially the techniques in the Reading Section are to lay any his heart). Take the recommendations seriously, then you have also a good chance of a respectable result.
For the preparation you should allow at least 3 weeks and do so about 30 pages per day. This is also fully professionals or students to create good.
Also helpful is the CD with the audio tracks for the Listening Section. The disadvantage, however, otherwise the releasable not offered correction of Speaking and Writing Section Section is contained in the book sample performance tests. So if you want to know how it is reflected in these Sections, must have more $ 45 jump in order to complete a sample test with subsequent correction of all Sections in ETS can. I did not do that and I'm glad that I saved my money. I am also so using the reading and the sample tests and a bit of luck (is simply a must) come to a result of 114 points. Higher it is realistically hardly.
What I will tell you this: Prepare yourself intensively and reasonable time with the book before, then you need prior to testing also not afraid to have. Without reading can not seriously encouraged to take the test.
A tiny point deduction there for my opinion unnecessary fragmentation of Writing Section (core concept) in Introductory, Body and Conclusion Paragraphs. This separation brings not, you have to write the test a whole essay on a topic.
Otherwise I can not think about the book nothing negative one!