Appreciate all the responses…
I sympathise with ‘BikinOn’ – contemplated buying a backup to my “old” EDGE 500 as in years gone by it would regularly crash and I lost several DIYs. Then thought ‘Hang on – you’re buying a second Garmin unit because the first is not reliable?’
Lately the edit switch and then buzzer no longer work suggesting the pcb has got wet too many times - the plastic surround gave way, where it forms the buttons.
So while the cheaper £40 Lezyne unit should be fine for recording rides, now I need a unit which will provide proper navigation.
And if the Lezyne Super needs a continuous connection to my smartphone, and the smartphone needs to be connected to a power supply, then the chain of dependencies is only getting longer! Might as well use my phone?
Perhaps it is different with maps (no maps on the 500), but I rely on the turn-by-turn instructions (plus the beep when I’ve gone off-course!), and more-so the beep and screen light after dark when approaching a turn. I regret the weeks of my life lost to entering them, but no way will I trust Google, Garmin or whoever to generate them from an autorouted course.
Does the Lezyne phone-combination work with self-generated (.tcx) tracks…?
Hence I’m leaning towards Garmin – as ‘andrew_s’ almost said “Better the devil you know!” Battery life is an issue, but I don’t see the Etrex as being very cycle-friendly.