I have a couple of threads on my experience with it that may be of interest:
There is some information in there about what you can tweak to maximize your results–stuff I learned along the way that would have been useful to have known going into it.
I probably should update them to reflect that after ~9 weeks of struggle to get Auto Mode dialed in to where I want it, I’ve gone back to manual mode. Made some progress with it, but ultimately Dawn Phenomenon just never yielded adequately to my efforts, and that was throwing everything else off. I finally decided I was putting a much greater amount of effort into the machine than seemed justified by any benefit I was getting out of it. But there are others who have been exceedingly happy with it. A lot depends on where you’re coming from. I was getting rock-solid 6.0 A1C’s before Auto Mode, but the best I seemed able to manage with it was more in 6.7 territory. The people who seem happiest (there are a couple of FB groups dedicated to the pump) are the ones who are managing to get down into the 6’s after years of >7 or 8. Also people with chronic, unexpected hypos. As far as the sensors go, I was on Dexcom for years before making the switch, and was very apprehensive about it, but in fact the Guardian3 is at least as accurate, in my experience.