At the end of the day, it doesn’t really matter what is producing the reading, the point is, that you can find out if your readings are high or low and medicate accordingly. It’s the number that matters, not where it’s come from. It’s like measuring a carpet, you can measure in feet and inches, or metres and centimetres, but as long as you consistently use the same units, the result is the same. If you know, or have been told, that a meter reading of 6 is the optimum, any deviation from that requires attention. It doesn’t matter if it’s 6 mmol/L, 6 apples, or six elephants, 6 is good, everything else is wrong.