I have a 6 week old and a 2.5 year old.
I would say do it, but ignore her stupid advice about expressing and don't be too anal about sticking to it. I did it for my DS and am doing it now for DD but on an 8 am to 8 pm routine, not her suggested 7 to 7, just because it fits better with DS nursery etc.
Also, I personally would maybe go for 7,30 to 7.30 as I ran myself ragged with DS getting up ready to feed at 7 am and wish I hadn't.
her rough times are
baby up and feeding by 7 am
baby plays and stays awake a bit
baby naps 9-10 am, woken at 10
feed at 10.30 am, then baby plays, stays awake
top up before next sleep I think.
sleep 12-2.30 pm
up and feed at 2.30 pm
nap 4/30-5 pm for no more than 30 mins
feed 5 pm
bath 6
feed and put down for 7 pm
wake and feed 10.30, put down again at 11.30, then hope they sleep a few hours in the night, feed as necessary.
I found her times more or less worked, it's not rocket science, her most useful advice is keeping the baby awake between feeds in the day, ensuring they nap well in the day and feed more in the day, keeping night time boring. good luck! I would get the book and just take from it what seems sensible..