| I didn't know that the sensor needed to be replaced every 12 hours...
Michelle, basically its like a large wristwatch (I wonder if it actually tells time too :p ) The sensor does need to be calibrated with your morning sugar reading...from that point, it monitors approximately if your sugar is dropping or rising, and I think the time difference is around 10 minutes (meaning, if you sugar rises to like 150, it was actually 150 10 minutes ago.) I might be totally off on that fact but it's what I understand...
Basically it works by the sensor heating up the skin, and somehow reading your sugar level that way. I've been told for some people they can get skin irritations, and that the watch/sensor needs to be moved on top or under your arm sometimes, or adjusted to different locations up and down your forearm...
I have a hectic schedual often, so having this would be easier than me having to stop and check sugar, although I'm debating whether taking 2-3 minutes several times a day really adds up, heh...
I would have thought saving money on test strips would have been awesome, but if there's a sensor that needs replacement every 12 hours....well...I need to do the math, maybe its still cheaper but I doubt it...  | 
