I just completed my 30 day money back period with the Navigator. I have sent the Navigator back for a refund. Why? Because 5 out of the six sensors did not even last 5 days. They all became detached even with over tape plaved over the sensor. I found this very frustrating for a CGMS that was highly touted. At this rate I will go broke purchasing sensors.
My misfortune could be your luck! I have two remaining unused unopened sensors. I will gladly sell them to anyone who needs them . Also, if you want to talk diabebtes I have had type 1 for 52 years. My opinion instead of putting all of this money into CGMS and all the other devices that let us monitor our illness, spend the money on a cure.