Ok so far I have tried the optima libre and after two weeks I am not confident this technology works in providing BG readings similar to a blood prick test using a freestyle optima reader also from Abbott. The libre reader after two weeks on 95% of occasions thus far has shown a reduced BG reading and knowing how I feel it is clear that the libre records lowers BG levels than actual. I will go back to Abbott and report these findings but I'm now thinking is their a more reliable CGM technology on the market. I have read about dexcom and Medtronic and would appreciate any feedback from users of these monitors as to accuracy of BG readings. Thank you, Nick