Tracking itself functions serviceably, but alarms are TERRIBLE and DISTRACTING. I am type 1, well controlled, but the sensor always reads false lows (<55 mg/dl) a few hours after insertion. There is NO WAY to turn off the false alarms other than to disable ALL notifications, which ruins your ability to track highs and lows after the sensor normalizes itself. These uninterruptible alarms are a threat to my privacy, discreteness, and sleep. Until that's fixed I'll be looking into other software.