Absolutely agree. I am relatively new to the diabetes problem, and it was a big learning curve. I wanted to find out what was really causing my BG level to hurtle up, and what was a mild jump. My doctor recommended that I stay between 4.4 and 5.0,and, have 3 meals per week with a little (100g) starch ( bread, pasta, rice). So i tried a test strip monitor and a Freestyle 3, each for 2 weeks at a time.
In summation, 3 in 6 of the Libre 3 units were within 5% of accurate, the other 3 units were all over the place and gave either way to low, or way to high readings (alarm went off constantly). My test strips always stayed reasonably accurate. The Libre3 was very comfortable to use and so i started relying on it at first, and this led to a general raise in my BG which had been pretty good before. As a result, i have now given up completely on the Libre 3. At first i recommended the Libre 3 to a number of friends and so they bought the Libre 3 too... They had the same problems and have also given up on it. For sure, it is convenient and comfortable and much much better than pee strips, but it is really only a very general gauge and can be very misleading. It will tell you that your BG has gone up if you eat a pizza or drink a bottle of coke, but you don't need a monitor for that as it is obvious. It will however show you approximately how long it is taking for your BG to drop afterward though, and that is a useful indicator.
After 6 months i have got my BG (HbA1c) level down to a non-risk level (35 down from 42), i have lost 26kg and have cut out sugar and carbs ( up to 20g per day) almost completely. I eat once a day in the late afternoon, and test by BG level before eating and 2-4 hours after eating, depending on what i have eaten.
I hope the above info is helpful to newbies. The future will bring improvements in the constant monitors, as they really are a must for people with full blown diabetes and those on the cusp trying to prevent a more serious condition developing. The constant monitor market is worth billions so there is an incentive for Big Pharma to pull their finger out and make better ones. Web sites like this are also extremely helpful and important, as doctors often do not have time to explain things thoroughly.