I used this book with both my children; implementing the guidelines as soon as they were born. I cannot recommend it enough!!!! Our children thrived off the predictable routine and maximum sleep time. They were fantastic sleepers and still are. At ages 7 and 4 both children have been sleeping (in their own beds) from 8:30 P.M. till 8:00 A.M. without waking up since they were about 9 months old. I cannot tell you enough how great it is to have evenings to yourselves and happy children during the day. If you do exactly what is outlined in this book, you will have a success! I have recommended this book to many of my sleep deprived friends! I even acted as a sounding board to them when they wanted to cave and slip back into old habits. But because they too stuck with it, their children are now fantastic sleepers. Read this book!!!! Get your life back!!!