I've had mine for two months now. I can now see that it reacts very well to what I have actually eaten and particularly how that appears to translate into overnight fasting blood sugar
I have stopped bothering to test with other methods because even if they are a bit different the freestyle will give me better trend information. I have found the internal freestyle fingerpricks and the sensor to be consistent.. I did call Abbott and get one replaced when the gap between the two was too wide - they will replace if for example you have three comparisons showing a bit gap . but I would leave it for a couple of days before you call rather than the first two days .