I am a couple of weeks ahead of you, @Bearpawk . I'm not planning to eat another muffin for a long while!
I am just about to start week 4.
After the fasting before and after the muffins, you can eat what you like BUT it really really is worth logging what you are eating at about the right time.
During the two weeks that the sensor works (and it does seem pretty strict about switching off), there are some food challenges that Zoe lets you choose.
I chose iterations of rice and cheese for breakfast (luckily I wasn't in an office as I farted for England with that), fruit and yoghurt vs shop fruity yoghurt, and humus vs chickpeas and veg sticks.
I could have done with better instructions for the post-muffin day, TBH. I launched into food swaps a couple of days early (but apparently it didn't matter).
I am sad that my biggest sugar spike was after scoffing a small pizza for lunch.
I've another couple of weeks to go before I get my gut and "how I cope with fat" analysis.
I'd love to get the rest of the family 'tested', but I have a hunch we are all very different.