I began using this book as the recommended text for a community education beginners Polish language class that I started last fall(2012). Our instructor is a native Polish speaker and she said that this series of books is designed to be used by any person of any language background who wishes to learn Polish. However, I find the book to be cumbersome as it is entirely written in Polish, which is difficult for a beginner to use. I found that I needed to use Google translate to understand the directions for the exercises.
The lessons don't seem to be well organized or very coherent, and the material tends to jump around from concept to concept.
I think that the book's strength is that it does help develop Polish reading skills quickly, but has a beginning text I am not sure that I would recommend it. I think that I am going to try a different textbook with English as well as Polish translation for the lessons.