Junaida (the illustrator) had a whole shelf dedicated to him at Tsutaya Books Daikanyama when I went recently. I bought this book because I knew I had to reread it. (Also, the illustrations can pretty much stand on their own, so it will make a good gift even to someone with no Japanese.)
When I got home and instantly started missing Japan, I reread it and it made me feel better actually. :)
I would not buy this book for language-learning purposes as there are only about 3-5 words per two pages