I ahve managed GF routines. dd1 was a natural (I only discoered this after a friend mentioned that the routine dd1 had fallen in to was a GF routine - dd1 was about 10 weks old by this point)
I got the book, read it, and indeed it made sense for dd1.
She was, and is, a brilliant sleeper, eating was great until this year (she's 3.6) but I think it's her autism causing problems. Breastfeedind went brilliantly, and she is a happy, healthy little girl.
With such a success, I tried it for dd2 from the start, although not in a rigid way (ie if dd2 was hungry/upset then she got comfort/milk, especially as a newborn)
We ahd to tweak the routines anyway, as life inteferes, so they are not so much classic GF routines with dd2, but a hint of GF plus daily life.
I ex bf dd2 until 6 months, then started weaning. She is still bf 3x daily now, and she turned 1 a couple of weeks ago.
I am lucky in that I do think I have daughters who like their routine (in hindsight, it was essential for dd1 with her autism, really feel it helped her know what was going on, but dd2 is NT so far, and also likes her regular naps)
You do have to go with what suits your baby - it would be tough (and unfair) trying to coax an unwilling baby inot a routine, I tihnk