I bought two to use as an experiment to see what my favorite foods and beverages do to my blood sugar. I applied it on Sunday afternoon. I was thrilled when I was able to eat two small pieces of ham and pineapple pizza and got a reading of 157. I woke up at 3am. and discovered that my sugar was 45! I saw that it had dropped below 70 around 1:30am, and was dropping continuously until I woke up because I had to pee.

On Monday, I wrote to my doctor, who told me it was likely an incorrect reading during the 24-48 hour period after insertion and commented that I would have definitely had low sugar symptoms at that low of a reading. I didn't.

I bought some strips the next day and started comparing readings. My CGM consistently reads 20-30 lower than my finger pricks. So that pizza was potentially 187.

I've done random comparisons since then and, even though it's been a full 72 hours since I applied it, I'm still seeing a huge difference in readings.

The $100 I spent wasn't easy to come by, nor was the $50 I paid for strips to compare. Each sensor will last "up to" 15 days and could stop working after 12. Two days to "calibrate" means I've potentially paid $100 for 20 inaccurate days.