@machiya I first went with CGM and saw what it took to get good time in range. It’s hard! Harder than getting a better A1C, because for that all you need is to spend a bunch of time low, to average out your high’s. I had CGM (Dexcom) for nine months before getting on the pump (Tandem with C-IQ).
Pump made the TIR much, much easier. And I’m still working on settings to fine tune variable basal rates, insulin to carb ratios that vary through the day, and correction factors.
At the cost of site failures (which I haven’t had to deal with, yet, fortunately) and being tethered to a machine 24/7. Which is an irritant, very true; and an adjustment.
At this point, I wouldn’t go back to MDI. I was injecting 8 x a day or more, trying to avoid big swings in BG. That is also a PITA!