“Hi - Both boxes tested slightly over the the control range, but I kept them anyway since I am using the meter to help me learn more about staying in ketosis as part of a new effort to follow a keto diet -- in other words, there are no health risks for me if the number isn't strictly accurate and I'm more interested in the daily trendlines rather than maintaining a certain number. In spite of the control problem, the numbers I am getting each day are in line with the numbers I was getting with my first box that came with the meter. And the results are largely in line with what I expect, based on diet and activity. Thanks.”