After six years of MDI, I finally dragged myself screaming and kicking to CGM technology, convenience and expense. For reasons beyond the scope of this post, I began by using the Dexcom G4 for a total of two months before my endo ordered a G5. Some might see the G5 as an upgrade; I beg to differ.
The G4 never dropped data, registered a difference of more than ten percent, or crapped out for five minutes or two hours -- but these are persistent issues with the G5. I read other posts suggesting corrections such as (i) changing sleeping positions, (ii) carrying the receiver within eight inches of the sensor site, (iii) being out of range entirely, (iv) first-day-or-two jitters while the sensor gets its act together, and (v) receiver not communicating with Share. These issues never had to be addressed with the G4.
The G5 regularly loses the signal for anywhere between 15 minutes to two hours; registers readings either double or half of a fingerstick; asks for calibration ten minutes after one is already entered; has registered one reading 10 or 20 points higher or lower than the one immediately previous. Furthering the frustration is that no pattern can be detected whether night-time, post-meal, post-bolus, or moon phase.
So the question is, in light of the issues and inaccuracies [read: unreliability] of the G5, why bother at all with CGM? I can think of plenty of uses for the same money, although they might not offer as many surprises.
If you have encountered similar frustrations, please share how or whether you got around them.