Have been using my Dexcom a little less than 4 months now. For the past 19 years, my average A1C has been 5.8, ranging from a low of 5.6 to a high of 6.3. I downloaded the Dexcom data and it predicted an A1C of 5.8 with only 1% of readings in the hypo range and 5% being low (55-70). I feel like the Dexcom has allowed me to have tighter control without as many lows and highs. I had my blood drawn for A1C test earlier this week and much to my delight, my A1C was 5.2! My best ever and no bad hypos either. Time will tell if this will continue, but I'm convinced the CGM made the difference. Very happy today!