I use the Libre 3 and Libre 3 Plus; I've had them for about a year now. I have little good to say about the accuracy or reliability of the sensors, which frequently fail, go low, or simply don't reflect blood glucose. I'm aware of the differences in the methodology of reading and what's being read, but often the Libre sensor isn't close, and at the moment, it's showing red and low, while a finger stickwith a glucometer shows blood sugar normal. I feel fine. I suspect the sensor is failing again, as it keeps going low, and presently seems to be falling off. It's been a regular feature of the sensors, and very frustrating. I haven't had any issues with them adhering. Initially, I used a type of plaster to cover the sensors, but I've found that they seem to do fine as is; installing and removal isn't a problem with one exception: a sensor that wwas painful on installation, bled through the hole in the sensor, and finally dropped off after serveral days. So far, only one has done that.
Calls to Abbott over failed sensors have yielded replacements, but it's like pulling teeth, between operators who barely speak English and their apparent policy of blaming the sensor failures on everything but the sensor. In Alaska, I hiked miles through the snow in high winds and -20 weather to mail a failed sensor back to them, with no feedback or recognition. Any more, they don't seem to care about getting the sensor back, and don't seem surprised when the sensors fail. Why would they? The sensors fail with regularity. I would be fearful of making insulin decisions based on these sensors, and as a non-insulin type II, I still do regular finger sticks to verify where things are. It only makes sense. To me, the only use for the Libre sensor is a rough indication of food response, in an ongoing effort to learn more about eating properly. Much of the data is questionable so at best, they seem useful for general guidelines or trends, but little else.