I used Gina Ford for my DD, I had seen routines work really well for other children and knew, for me, I had to have some kind of routine to follow. I feel the same as others on here; if you try to stick to what Gina Ford recommends to the letter, you will go mad/feel like a failure. I feel the most important things to get right are feeding them enough to see them through 7 to 7 and making sure they know that bedtime is bedtime (this is where you must follow your baby's lead in terms of them perhaps needing more sleep/milk during the day than Gina Ford recommends).
I always reminded myself that Gina Ford has no children.
Also, I have lots of friends who do not believe in waking a sleeping baby, or getting up at 7am every morning to feed. But they invariably reach a point where they are at the end of their tether and just want some sleep/couple time! To be blunt, if a parent doesn't care about waking a lot in the night, or having a baby awake until late into the evening, then that's great, but when they start to despair about how little sleep they're getting, or the fact that baby is always attached to them, I just think, baby can't change this, you have to!
People always made comments when DD was a baby like, "ah well, you were lucky with her, she's such a good sleeper and she's so chilled" they also said, "you're lucky, you get your evenings and she goes to bed really well". 'Luck' didn't come into it, it was hard work! But so worth it.
I'm expecting twins in the next few weeks and will be following Gina Ford again, where it suits me and babies!
Good luck all you lovely mummies, enjoy xx