I’ve posted a couple of threads on my experience with the 670G so far, but here are a couple of top-level things:
-
Be patient. This is going to be more like when you first switched from MDI to a pump than like just changing from one pump brand to another. You’re going to run high for a while because the process of getting it dialed in is very incremental and the medicos, as always, are far more concerned about lows than highs. It takes everyone a while to get the Auto Mode thing optimized for your personal needs and metabolism. Weeks, even months, not days.
-
A lot of the terms you’re familiar with–carb ratio, sensitivity, active insulin time–don’t apply in the same way you’re used to. This is because the whole logic of how this thing works isn’t the same. The fact that it’s targeting a certain BG level rather than running fixed basal rates changes everything.
-
They start everyone with pretty conservative settings. AIT is particularly crucial, and you’ll probably want to shorten it up quite a bit as you get acclimated to this thing. If you’re used to tight control, I’d push for that sooner than later.
-
CGM accuracy–just as an FYI: I wore my existing Dexcom G5 as well as the Guardian 3 sensors for my first week. I found the Guardians were at least as accurate as the G5 (neither is perfect) and had far fewer dropouts (a critical consideration, given CGM data is 100% required for Auto mode.
-
If you’re on Facebook, join the Medtronic 670 Users and Medtronic 670 Support groups.
My good news: I’m now in my 3rd week on Auto Mode, started tweaking my own settings earlier this week to make the thing deal more aggressively with my highs, particularly the Dread Pirate Dawn Phenomenon. This morning I saw the best numbers I’ve had since going on Auto Mode, finally looking more like what I was seeing before starting on it, though it required going past some “You’re setting is Not Normal” warnings to get there.
Good luck and let us know how it’s going!