Yes and I loved it. Except I did my own “light” version.
I know way did all this “have a piece of toast at 8am” malarky.
I just tried to encourage the feeding and sleeping routines.
One thing I did to encourage routine was to get them and feed them at 7am no matter what had gone on the night. Ta well established even with adults is to wake up every time at the same day.
Then I followed the bottle times of 7, 10.45, 2.30, 6pm, bed at 7pm and a dream feed at 10.30pm.
I kept days bright and loud and they slept wherever we were. (None of this swaddling in a dark room etc) with lots of noise. Night times were kept quiet, minimal talking, minimal interaction.
My daughter stuck to her nap times naturally. My son had a different idea and he liked a morning nap and to miss the long middle of day nap and then have one from about 2-4 and that worked for them.
Before I did a routine I was jibbering mess.