Does anyone have any experience of using the Telepeage tag on a trad? These are now available to us Brits from
Sanef : but they suggest that - if you have a heated front screen - the tag
must be affixed in the "shaded/mottled (ie non-heated) area behind the rear-view mirror".
We don't have such an area on our screens - nor much room behind the stuck-on mirror

Seems like it might be worth the 16 Euro (or so) fee for the convenience of not having to scrabble around for change, stretch to reach the toll booth/card slot, risk incurring the wrath of the Frogs etc.

... but only if it works!
Any first-hand experience anyone?