Agreed. 20% margin of error isn't really that relevant to me either. I don't really care that much if I'm 70mg/dl or 100mg/dl if the line is horizontal. Both v

Agreed. 20% margin of error isn't really that relevant to me either. I don't really care that much if I'm 70mg/dl or 100mg/dl if the line is horizontal. Both values are, roughly, in the "OK Zone" that I just don't care about better precision. Even if I'm going low, the difference between 50 or 70 isn't nearly as relevant as the rate of change. If I'm going down, but the slope is gentle enough, I know I probably don't need much to get back to normal, while if it's steep going down, I probably need to eat something regardless if I'm 50 or 70, or 80.