I bought Tizzie's package deal ($16US/$22AUS) and had basically thrown it out the window in two days. I wasn't happy with her VERY strict routines. While she did give me alot of tips on settling and the idea of a routine, it seemed to stuff us up more than I thought it would. Jebs was sleeping though the night most nights from around 4/5 weeks and as soon as I started tizzies routine he started waking up for a feed around 3am again even though he was doing a "dreamfeed'(a feed at 10:30pm where you pick up a sleeping bub and offer then a boob/bottle and put them back down without them really waking up) which he hardly drank anything then anyway because he's a bit of a lazy/sleepy feeder. The she tells you that you have to adhere very strictly to her routine to make it work ie feed at7am for 'x'amount of mins on left breast then'x' mins on right breast express up to 'y'ml of milk now, play with bub 'til 8:45am then wrap and place in bed awake to self settle, then WAKE UP BUB at 11am for next feed etc.... This is where I think she is pushing the routine part abit to much. I've always been told to leave sleeping babies sleep.
Now I'm not saying that these routines wouldn't work for you or other bubs but it didn't sit well with my little man. Now I've stopped the strictness he's sleeping through again after stopping after 2 days of her routine it took him another 4 days to get backto sleeping through. I will say that her routines and settling tips gave me very good base to work off to start our own routine. Jeb did take very well to feeding every 4 hours, then playing for about 1-2 hours then having about a 1-2 hour sleep but he refuses to go to bed earlier than 9/10pm. He sleeps well during the day but he only sometimes has a nap while we have our tea then has his last feed then off to bed to sleep through.
Basic if you want to TRY to have a strict routine go for it, but you and your bub know best. Maybe buy her routine and do what I did and just use it to base your own life around it, get some useful tips along the way but don't force something on the two of you if it doesn't feel right.
Hope my rambling make sense and helps. smile