I just been speaking with libre support about inaccuracy. They keep telling me to allow 10-15 after bg tests. Yet according to there own website it says 2.4 minutes. I told them this lot's of times. You can't have both. They are sending me a reader and sensor. They previously sent a neo meter. The man had no explanation why there own website say's 2.4 minutes. Most times it is accurate, but not always.