I have used Medtronic Minimed pumps and CGMs exclusively for 17 years. About a year ago I upgraded to the 780G and am about to start using Guardian 4 sensors after having been on Guardian 3. I like that the Minimed pumps combine, in one device, the display and memory with the insulin-dosing system. I don’t have a smartphone at present, so can’t consider a pump that depends on one for readout and dosing.
I have used Apidra for all 17 years. As long as I continue using it, I cannot use Tandem pumps because Apidra is incompatible with the Tandem’s bladder, according to what I have seen on the Internet.
About Oct. 3, 2021, I reported on this forum https://forum.tudiabetes.org/t/dexcom-g6-cgm-trial/88437 my comparison of two samples of Dexcom G6 sensors with Minimed Guardian 3. Contrary to what many people assume, I found that one of the two Dexcom sensors was seriously inaccurate. At the beginning it read too high by about 65 mg/dL, but the Guardian 3 reading was close to my measured BG. Later, when I was feeling somewhat hypoglycemic (BG 69), the Guardian 3 sounded an alarm, but the Dexcom G6 read 82 and gave no alarm.
The second Dexcom sensor behaved better, but it was still less accurate than the Guardian 3.