I first used this book when I decided to study Japanese seriously in college. I hated this book so much back then but now that I look back on it I realize how much Japanese I really learned due to this book. I have gone back over this book many times. Many of the lessons that seemed difficult in college are pretty easy now. Te-forms was something I seriously hated going over in college. But the lessons in this book made it more understandable. I started only knowing hiragana. I now know hiragana, katakana and some kanji. I recommend this book to any beginner in Japanese.