I've used the Volta charge stations, but not with the Ariya.
FYI I didn't have any issues with it but a friend of mine had the station melt his Tesla's J1772 adapter. Researching it a bit more online and in other forums this seems to have happened to a number of Tesla owners. Since the Ariya doesn't use an adapter the situation wouldn't apply - I presume the Ariya would send an alert and terminate charging if it detected a short or a temperature threshold was exceeded.
Bottom line, I'm now a little wary of Volta and am waiting to see how this all shakes out. Free charging is great, but not if it damages the car or melts accessories.