I have been reading your posts about the current blood glucose meters (and blood ketone testing meter Optium Xceed) with great interest. I use pretty much all of them in my work as a Diabetes Nurse Consultant, as a person with diabetes myself and as a mother to our youngest daughter with Type 1 Diabetes since age four.
The fact is that due to the current method in these meters, there is a difference if you test the same blood droplet in 2 or more of them simultaneously. There will be a difference even if you did the test in the same meter a few times running. The accuracy of the BG meters is known to be only in the range of ~80%. However, as we use the same meter day in and day out, this variance really balances itself out & we do not come to any harm from it even in our decisions of insulin doses.
AS to the Abbott Navigator Continuous Glucose Monitor, I would recommend it - or the DexCom Seven Plus or Medtronic RealTime CGM - to anyone! I am currently on Day 14 with the Navigator sensor! How good is that & really makes the cost of one sensor (£40) come down to a very reasonable amount - possibly about £2-£3 - the price of a Costa coffee in London! The sensors have to have a guaranteed duration before they can get past the strict licensing approval and for Navigator this is said to be 5 days, for DexCom Seven Plus 7 days, and for Medtronic RealTime 6 days. In practice, I have seen DexCom last up to 20 days, Medtronic sensor up to 12 days & I am going to trial if I can get up to 20 days out of my Navigator sensor!!!
I would not any more know how to get really 'normal' glucose levels in my patients, my daughter or myself IF I DID NOT HAVE ACCESS TO A CGM! Try and see if you have any doubts.