Excellent Japanese language learning book. Amazon keeps prompting me to review this, otherwise I wouldn't have, as there's a new edition out now. The good thing about the new edition is that it comes with an audio CD. With this edition, only the workbook had a CD. The CD covers all the target dialogues and other dialogues. It's a bit dull compred with the likes of, say, Japanese101 Pod (highly recommended), but I think it's beneficial to listen over and over again to the dialogues nevertheless.
I really like the methodolody behind this course. It's a buisness Japanese course but is very much grammar-based. Very well thought-out and organised, and it deserves a lot of praise.
I wouldn't recommed tackling this text alone, but if you go to langauge classes with this as the text and study it alongside a great audio product like the lessons and lesson support from Japanese101 Pod, and a more 'fun', casual Japanese book like Japanese the Manga Way, you should be able to learn quite effectively.