I'm brand new, about 30-days, to a CGM. I'm using the Dexcom G5. I'm doing so much better managing than w/o it. i have my a1c numbers consistently down in the low 6% range. that's from over 9% a couple months back.
I just t2 but insulin dependent for now. The thing which made the CGM the best thing since sliced bread, well not so much these days right? is the ability to view the curves representing insulin on board, current BG reading complete with projections, you can determine the rates your body is consume insulin (guestimated of course) as well as seeing the rate various carbs increase my BG level.
I'm a mathematician by the education so viewing the data just clicks in my brain far better than tracking finger stick readings has ever done. In the past i could only control my BG if i did 20-30 sticks daily. There was far less guesswork filling in readings between sticks following traditional finger stick reading frequency. Now my biggest concern is determining when a sensor is gone batty needing red and calibrations.
No ya don't need to be as OCD i am interpreting the data, anyone can learn to understand just what the data is saying via graphing it.
I use xdrip+ due to limitations on the actual Dexcom apps but they all give the same info...a person just needs to invest themselves totally until it clicks. Having a CGM but not working to understand the data is sort of a waste. to me it's that relatively instant picture of where i stand at them moment.
Say i get a low warning, i can look at the curves and see the actual speed (ie. rate) my BG is dropping. That has helped me learn i can relax and attend to the potent issue slow rather than a big dose that begins a roller-coaster ride for my BG level. Same goes for highs. i can observe the exact affect different carbs have on me, many have a very fast sharp peak, others might not hit for a couple hours. I have been able to eliminate a bunch of carb containing foods and determined i can eat 25-35g per meal pretty much any time of the day. Over that and oops!
Anyway that's how a CGM benefits me. We are all so very different so what get from it is different from what you might find. Still it's very worth taking a swing at it...worst that can happen is it doesn't fit for you.