My upper readings (150+) are a bit higher than when I use a separate test meter as a comparison but my Libre lower readings (120-) are seriously questionable. Just this morning, my Libre gave a reading of 81 while my Breeze2 test was 140. Had I relied on Libre, then I would not have taken the insulin. I will be documenting this sensor's readings even if I have to pay for test sticks myself. This is not a fluke in sensors or locations for the sensors. I questioned readings in the past but have never put them to the test. I will now document this. I plan to continue my discussion with the people at Libre and will strongly suggest that they at least supply me with free test strips. I will tolerate the finger sticks because I want to know which system is accurate. I am inclined to believe that my original Breeze2 test strips were accurate because my numbers matched those needed for very good A1c test results. However, time will tell. Please let me know if you have seen anything similar to this with your sensors, Libre or not.