Just to feed back, returned from trip to France a couple of days ago.
Curve worked a dream pretty much across the board - including at Petrol pumps, I would advise that Total seems to block about 150.00 EUR when you fill in addition to the amount of fuel taken which does drop off eventually but which takes a few days, this is not Curve’s fault however.
Didn’t use at Motorway tolls in the end as we purchased a tag before travelling.
Only place we had slight issues incidentally was Flunch restaurants - wouldn’t work contactless there either via card or Google Pay but chip and pin worked fine.
Elsewhere used the card worked fine with Contactless, Google Pay and chip and pin.
Great to have the instant spend notifications too on your phone with sterling conversions, will be a bit of a blow if this becomes harder after January with the end of free EU roaming, but I’ll stop now at the risk of getting political…