Quinn Rohlfwrote a review of Garmin Edge Explore 820 Bike Computer on July 17, 2017
Familiarity: I've put it through the wringer
I purchased this device in October. From day 1, it had bad touchscreen issues, maybe one in three touches would actually go through on the device. I didn't return it because the official word from Garmin was that this was a software problem that would be fixed in the next update.
Fast forward 5 major version firmware updates, and the touchscreen performance is just as bad, if not worse. Even trying to switch screens with a big swipe tends to not work 50-70% of the time. In addition, the battery life seems to be getting worse as the firmware gains complexity.
I've contacted Garmin about the touchscreen issues, and given their support response it seems this is the expected level of accuracy for the 820.
If I were buying a new head unit today, I would not buy an 820. Instead, the Wahoo ELEMNT Bolt is a compelling option that will give you fewer headaches both on and off the bike.