We've found them to be pretty reliable here. They tend to lose accuracy for extreme highs and lows, but when it's within 80-250 it's pretty spot on with our blood meter.

xDrip also has a feature that will calibrate the libre with pokes which increases the accuracy.

We never bolus off the libre's readings though, but it's fantastic for trends and seeing spikes and crashes in real-time. For example, I can see that my son is high af between 8am to 11am (post breakfast spike), so I've tweaked his basal rate a few times so that he's always in range now during that time period with no crashing afterwards.

I mean, I would love a dexcom over the libre any day of the week, but I'll take what I can get here in Vietnam.