I was primarily struck by the awesomeness of this whole autonomous glucose regulation thing. My last meal is usually around 18:30 in the evening and during the night glucose would fluctuate around 4.5 mmol/l between 4.0 and 5.0 in 1 hour periods, like a crappy PID controller that needs a firmware update. Other nights it would be flat instead of fluctuating, but unfortunately two weeks were too short for a controlled experiment, meal repeats and figuring out what caused the difference. Some nights it would show a couple of hypo's where glucose would drop to 3.5, quickly to be countered by an increase. I didn't notice a thing.

Additionally every morning before my alarm went off, I could see my glucose increasing, most likely preparing for wakeup, all by itself. Amazing!

It gave me a new-found respect for these otherwise invisible processes happening in this fleshy vessel on autopilot with closed cockpit doors. I only got to peek through a small window during 2 weeks.