I’ve been using the X2 now for just under a month.
I’ve seen dramatic improvements in my time in range (before X2 I averaged about 70%, but now over 80%+ (within a 24 hour period) is very normal and I’ve gone as high as 98%. These are remarkable improvements.
That said, Control IQ is not perfect. For example, sometimes prior to a meal, my blood sugar will drop and Control IQ will suspend my insulin to keep me from dropping low. That’s fine-- but then when I eat, sometimes having received no basal for 45 minutes-1 hour in some cases, Control IQ doesn’t know how to deal with that and I often go high surprisingly fast.
How would you handle this case? I probably need to account for the fact that I’ve got no insulin on board, but I can’t prebolus or I’ll go low.
In a perfect world, when I enter my carbs Control IQ would go HOLY CRAP HE’S EATING NOW, and go into overdrive to account for the fact that I’ve got not nearly enough basal insulin working. But as I understand it, Control IQ is not a learning algorithm-- it’s strictly reactive to whatever the numbers or their projections are.
I’d love advice from anyone with more experience on this topic than I have (which would be pretty much anyone on X2 longer than 1 month!)