My experience has been very good. Ive been in auto mode for about 3 months now. A1C last month was 6.6, with no lows to speak of. Maybe a couple (totally my fault though). I expect a full 3 month’s worth will get me to 6.3 or 6.4
The biggest advantages for me are, far fewer lows, the highs arent as high and dont last neartly as long as before. Its nice getting up in the morning between 100-130 EVERY DAY. Its amazing. Ive been T1D for 51 years, and never realized how I thought about my diabetes until I got this pump, and…well…dont think about it much at all. Ive learned to trust the tech, and it takes care of me.
As far as the Guardian3 sensors, they are definitely more accurate than the Dexcom 4 was (IMHO, of course). They are rarely off more than 10 points. I also get a solid 2 weeks out of them on most weeks.
All in all, IMHO, this is the best tech Ive experienced in the last 50 years, with the one exception of home glucose testers.
My personal note…Ive read many people complain the target of 120 on the 670G is too high for them. My opinion is thats fine, for them. I personally like to live my life, eat what I want, and spend as little time as necessary in micromanaging my T1D. I refuse to let my diabetes manage my life and dictate what I do. My philosophy is I manage my diabetes, not the other way around. So a target of 120 and an A1C of 6-7 is just fine. For me.
edit: Ive read many people also having trouble getting Guardian 3 sensors. Ive been lucky I guess. I get mine through Edgepark and havent missed a shipment.