Below is the message I sent to Garmin after-sales service:
"Gentlemen, I made the purchase of a Garmin Edge Explore 820 at the end of June 2017, at V?lo 77, at Claye Souilly, in order to make a Paris / Issoire route in the Puis de D?me 63). Before leaving I did some tests in order to familiarize myself with the device. I noticed during these test runs that, without any reason, (without manipulations on my part), several times the device "crashed" (no more control possible). I was then forced to reset by keeping the on / off button pressed for a few seconds. Considering that this was a manufacturing defect, I brought the camera back to the store and exchanged it for the same model. I soon found the same bugs on the new device. The day of my departure being not modifiable I made my journey of 550 km supporting this handicap which occurred, on average, 3 times every 50 km, I could also see failures in the "economy mode of the battery ": sometimes the screen did not turn on automatically when approaching the crossroads with change of direction or simply, the economy mode no longer worked at all. These random failures never occurred as a result of manipulations on my part. To remedy this, I had to switch the device off and on again and, if it did not work, reset it by holding the on / off button for several seconds (fortunately this maneuver did not cause any loss of previous data). You will understand that I am very disappointed with my purchase and I expect you to exchange my Garmin Edge Explore 820 against another model without these defects,
After this mail, they replaced my device, From the first try the same trouble began again.
I note that I made the updates regularly for the 3 devices,
The routes installed in the device had been prepared on the Garmin Connect site.
I found reports of these defects on different forums.
In conclusion I strongly advise against the purchase of this model.
Michel Coudert
