If the routines work for you, that's great. As has been said, it's horses for courses. Having had two babies, I honestly believe that it will only work in the minority of cases, so no-one should feel bad if it didn't work for them, or for choosing a different option - I am a huge fan of Pinky McKay's books.

I do recommend caution though with the feeding times. Newborn infants need to feed between 8 and 12 times in a 24 hour period - this is their physiology, and also due to the nature of bm which is designed to be easily digested. Their tummies are only as big as their tiny fists, and really, apart from overnight, how many of us even as adults with huge tummies would go more than 2 hours or so without a drink of some kind - water or a cup of tea? And as our physiology as bfing mums also relies on baby feeding frequently, routines where babies are only supposed to be fed every 3 or 4 hours will in most cases result in a loss of supply. So if you are following a prescriptive routine just keep this in mind.