I have yet to see whether the methods are scaleable and replicable for me, but a lot of the content resonated with me, especially the insight that concentration to flow states is a skill that can be learned and brought down from 20 minutes to just one with training.
It was an interesting mix of fundamentals from Cal Newport (Deep Work), plus mind emptying exercises, concentration meditation, exercise breaks and group work sessions.
I'll probably dig more into it.