The main adventage is the thematic approach. For instance, under "Living" you will find lots of sub-topics like parts of a house, buying or renting, etc. The phonetic transcription is very useful, and it has what should be a must in this kind of books: many examples. Furthermore, you are given the gender of nouns and the conjugation of irregular verbs. The only real drawback (inexplicable as it is) is that you are not presented with the plural of the nouns. Given the nature of the German language, this may be a problem, since you are required to look them up in order to ascertain the plural.

Nonetheless, this is a very good book, especially for those who have already a basic level. I recommend using it in conjunction with a notebook or flash cards, so that you may get the utmost of it.

If you are interested in the actual construction of the grammer I'd probably buy this book (as it does have LOTS of very useful phrases/examples) along with something like "Collins Easy Learning German Grammar" which goes into depth regarding the structure of the grammer.

Buy this book if you want lots of examples to work from..!!