Here's my first 24 hours. I'm quite happy with it, but welcome any comments or feedback. I activated the sensor around 5pm yesterday and created the graph around 6pm today, just to have a play. The 3.9 reading was the sensor and not a true reading. I felt fine and measured 5.3 in my codefree. Since then it seems to have settled down and is measuring approx 0.4 lower than my codefree monitor.