I used Gina Ford on dd1 when she was about 4 months old (was bored on Maternity leave and needed a PROJECT )
it worked fine but tbh she was already in a routine already
didn't leave to cry or any of that nonsense but used the feeding routine (from the Gina Ford weaning book) and she had a 3 hour nap at lunch
I agree, this WAS a pain in the arse as shhe would only sleep in her cot
dd2 was a law unto herself (still is), slept anywhere as she had to fit in with dd1
HOWEVER: dd1 has always been a fab sleeper, dd2 is a pain in the arse, one was in a routine, one wasnt. Coincidence? Mehbe.
I LIKE routine, some people do.
and never leave them to cry it out, that was one part of the book that upset me, iirc one couple left their baby for 90 mins??? (I may be wrong, we are talking nearly 6 years ago I read this)
To op, just pick bits out of the book that you see fit, if it says you feed at 2pm and it is more like 3pm, don't sweat it