Love this book. My children (5 and 4, but we've been using it a couple years) love the stories and we work slowly through the memorization of the Catechism questions. They already know a ton of them!!!
Only draw back... One of the last chapters teaches about baptism of infants and we believe baptism is for a person only after they have come to put their trust in Christ (as we see is explained in Scripture). Instead of tossing the whole thing, though, for that one problem, we choose to skip that and use the rest of the material.