As the title says, the textbook is good, however, its best if you already know your hiragana, and most of your katakana, before starting it as it jumps right in without romaji for much of the book. That being said, the book follows a story where there is main non-Japanese character learning and living in Japan, so you learn much the same way you would if you were to be in a similiar situation.
I like how instead of the furigana being on top of the kanji, its below, to make you look at the kanji first and try to figure out how its read before you use the furigana underneath. As you can guess, this textbook has you learning kanji from the very beginning (which is both a good and bad thing depending on your prefrence).
There are activites in the book to try out, but the ones I've come across so far need a partner (which is good for multiple students (or a classroom setting), not so good if your studying alone). It doesn't have an intergrated workbook (which you need to buy seperatly, which I have but I have to recive it but when I do I will be reviewing that as well).
Overall, I am pleased with this book and will be happy to use this book for the next while in my studying, and adding it to my collection of textbooks.