I've had several attempts at trying Tizzie Hall routines, and for so many reasons I've had to abandon them each time. When I first started, I ignored her settling advice and used gentle self-settling methods to get Bonnie to nap, and to nap longer than 40 mins at a time.

Now, Bonnie naps like a champion - self settles and sleeps for 1.5 - 2 hours at a time throughout the day. But this development had nothing to do with SOS routines, one day she just figured out how to nap by herself.

You would think that having a "proper" napper would make these routines easy on us, but there are other issues rather than the crying to sleep issue.
1. If Bonnie woke early from her morning nap, the routines say to keep your child awake until the next nap time (sometimes this could be over 3 hours!). I could never do it, I found it impossible to ignore Bonnie rubbing her eyes and looking miserable because she wanted to sleep. She was tired, it was my job to respect that and let her sleep!
2. I was supposed to wake Bonnie at 7 in the morning to start our day. But as a sleep deprived mum, I'm going to catch as many zzzs as I can - so if Bonnie wants to sleep in until 8.30am, I'm right there with her. There is no way I'm going to force myself to get up and lose even more sleep.
3. Intellectually, I just can't believe that some magical concoction of x amount of daytime times at precise times and x amount of feeds at scheduled times = a full nights sleep. We're "roughly" following a similar routine that's emerged naturally - 2 hours up, 2 hours down, 4 hourly feeds etc, and Bonnie's nighttime sleep is still all over the shop. I find it hard to believe that if I make the hours EXACT that this will make a difference.
4. These routines make your life revolve around and fixate on your baby's sleep. There is so much more to being a mum. I also found it impossible to have any social life on these routines, and personally for me - hanging out with other mums is just as valuable to me as a good night's sleep.

That being said, I AM curious about whether they work for other people. Like I said, I've never been able to stick to them for more than 3 days in a row so I'll never be able to say for sure if they work.