1. Welkom! is less capable of self-study, a learning system for evening classes, through partner exercises. 2. If you want to work meaningful and successful, one must acquire the complete package: Textbook (with 2 CDs) 28.-, Workbook (with CD) 18.- (! Without Workbook not go), vocabulary coach (without the go also not, with 2 CDs for listening and 1 CD interactive learning vocabulary after the index-card-principle) 12.-, not absolutely necessary, but useful: the answer booklet to textbook and workbook, 7.-. Are ever 65.-. 3. The textbook contains only the grammar for substance of the textbook. To supplement I recommend Pons grammar nutshell, 12.-. 4. The textbook has broken down in the notes a vocabulary list for lessons - not in alphabetical order. The workbook however, includes an alphabetical list of words. 5. You can not help, in addition to purchase a pocket dictionary, eg Langenscheidts, 32.-. 6. The vocabulary trainer is highly recommended! It enables to change the direction question. Unfortunately, it is not complete. If you have learned all the words of the coach, one discovers in the lessons again unfamiliar words! Although you can enter more words, but then missing the debate to shame. 7. At the end of each lesson is followed by a summary of the idioms and grammar. In addition, grammar and spelling are the booker. Here I would like to see as a summary of all scattered in the book sayings in the book end.