Amazing! My baby slept 8 hours through the night starting at 8 weeks. What a blessing for him and our family! This is been such a helpful book for me as a new mom. Now my baby is 9 months and falls asleep on his own, sleeps 11 to 12 hours a night, and takes great naps. He is a very happy little guy and Mommy and Daddy are happy too because we all are well rested. I'm so grateful to my friend that recommended this book!