I am very happy with the book. The grammar is introduced piecemeal. For each chapter there is a manageable number of words that you should learn. The audio plays I have not used after a certain time, because I could learn the pronunciation in the language course.
Even if some parts are designed so that they are done in group work, you might go through in my opinion the majority of the book for self-study. Now this I try to test yourself by catching up and repeat.
Some Subchapter is impractical, such as when it explains the abbreviations we use, in an SMS. Some sub-chapters are also to Fremdschämen, such as when an online forum is presented, in which wrote about love problems.
Overall, a very useful book that helped me quickly get to a decent level A2.