So far the only bug I've had is that my iPad will connect to the Garmin via Bluetooth, but the Garmin still says that I'm disconnected until I tinker with it for a while. But it could be just how I try to pair it, as now the pairing seems to go faster as I become more familiar with how the device works. Other than that it's been quite bug free. I've also been recording every ride with my Android too 'just in case', but so far that backup data has not been needed. Recorded mileage, elevation, etc. are all very consistent between the two.

Keith