[2]: https://www.ambrosiasys.com/our-products/blucon
A word on accuracy, as a type 1 diabetic I have not pricked my fingers once since I got onto the FreeStyle Libre almost six months ago and I am achieving excellent control of my day-to-day levels. Take from this single data point what you may, but I want to offer it as a counter weight to the “need for calibration” I heard before I received the device.
I am currently holding off on getting a MiaoMiao2 until mid-November just to avoid the first few batches of the device that may or may not have manufacturing issues (simply being cautious, I have no evidence). Having easy access to continuous historical data changed my life as a type 1 diabetic, imagine having pain-free and instant access to your levels when you are on the go, stressed out, sick, or just as you wake up in the middle of the night. Then add to this being able to look back eight hours in time to adjust your mental model when things go wrong. It is a matter of night and day. Now I am hoping that turning it all live will make things even better.
One other aspect of the FreeStyle Libre that I was not expecting was a feeling of accountability. When I was just finger-pricking I could essentially hide high blood sugars. Say I had eaten some sweets or something, and forgotten to take my insulin, I could sort of hide from the responsibility of that high reading by just taking my insulin when I remembered and testing in a few hours - my Consultant would never know. However, now I am aware that my sensor is going to read that high sugar, and that makes me feel accountable for it - so I have seen my insulin taking get more consistent, and this has resulted in less hyperglycemia and hypoglycemia (as a result of mistiming the insulin and whatever I have eaten).
On your point about accuracy - I have found it to be a little out in the extreme highs or lows - for example there have been a number of times when my sensor has given me a reading of, say, 2.4. However when finger-pricking I might be 3.9 or 4. Now this could be because the reading is about 15 minutes behind, and since that moment my liver has pumped out some glycogen. But I have had similar accuracy issues when high - say above 18. Having said that, to me this is not a problem, and the accuracy between 4 and 18 is pretty spot on (apart from one sensor that went bananas and was reading at least 15 above what I was for about a week).