Just putting my two bob in... I've actually found the book great for my DS. I've found a structured routine has been gerat for him, as he sleeps great during the day and all night (touch wood) I never followed her routines until my bub was probably 3months old, I didn't like all the "express left side 25mins then feed on right side for 15mins blah blah", but the routines for older babies was good for us. In saying that, I think my DS has benefited but I've found it HAS limited my social life. I tend to watch the clock, needing to get home at a certain time to have him in bed etc and that is quite limiting, and kept me pretty house bound.
But each to their own....