This book did make a wonderful difference for us. My first baby slept through the night at 7 weeks. She is now 4 years old and a happy, sweet, well behaved little girl. The basic ideas of the book about setting up routine and schedule for babies worked really well for us. Whenever she cried or fussed, we knew exactly what she needed. No guessing. We are now taking the same ideas we used on our first daughter and applying them to our 3 week old. I don't care about the religion of the author or the controversy about his credentials. The principles of the book are solid and make sense. Of course, as with everything else having to do with babies, you should pick and choose the information that works for your family. We didn't agree with everything in the book, in fact there were quite a few ideas in the book that we felt strongly were NOT right for us, but agreed that a routine would be good for our babies since it set a pattern of predictability that I think is very good and healthy for them and us.