It is a very compact course for beginners, and is not intended for self-study. A good thing is that you will be equipped with lots of vocabularies after the course, and the grammer point is clear. A bad thing is that you will still confused how to conjugate peterit, imperfect, subjuctive, conditional, future, imperfect subjuctive etc after the course, because all of these grammers are taught in 6 or 7 chapters. Anyway, the textbook worths five stars because I feel I learnt a lot about Spanish in 8 months. It is a very demanding course if you don't have foundation of any Latin-based language.
The Workbook and Lab Manual uh... very very boring. It is a typical workbook, and is not interactive. I have tried another Lab Manual, like "Puntos de Partida" (if I spell it right) and found that it is much more interesting and interactive. There are more exercises in "Puntos" lab Manual than "Como" Lab Manual. And basically a large part of "Como" Lab Manual is to follow the recordings and read out the texts in the textbook. And actually these recordings are the same as those provided in the student cassette. (I feel cheated!)
Overall, the textbook is good but the Workbook and Lab Manual is not satisfactory.