• My Garmin 520 has been pretty reliable, and it looks like the 820 might share a lot of the same internals - but with enough space to store maps.

    So for long stuff I'm thinking about using an 820 primary and a 520 for back-up recording & gpx line following. Backup maps/re-routing are on my phone - I also use OSMand which is so much better than a Garmin for fiddly city navigation.

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