New member here, first time posting. I began S&S in April of this year. In June my wife had twins(!), life has been pretty hectic since! I'm still able to train 3-4 times a week if/when both babies are asleep, though it's typically at night or 5am. Because of the babies I only get a handful of hours sleep at most, rarely more than 2 hours at a time. It goes without saying that I'm always tired, but S&S has given me more energy (a recharge) than I would've believed possible.
However, being tired all the time has also helped contribute to the biggest mistakes I've made with S&S so far:
1. Stopped warming up, just didn't have the time. I'm now re-evaluating that decision.
2. Tried to go too heavy too fast with the one-handed swings. I attempted to jump from 24kg to 32kg entirely too soon and my form suffered.
3. I've sometimes focused on quantity instead of quality, and allowed my form to go south instead of stopping when my body was too tired to continue.
4. Neglecting rest and/or the light day option when my body needs it.
5. Occasionally did other routines when S&S felt boring.
That said, since starting S&S I have lost 20lbs and gotten pretty gosh darn strong! My shoulders feel better than they have in years, my posture is better, and my body moves differently. Looking forward to reaching the simple goal (currently performing both exercises with 28kg).
When S&S gets boring, re-read the book, you'll pick up on a lot that was overlooked. The moves will become much more interesting as you explore each facet of the exercise.