Visited on May 20 and charged with credit card.
The contactless transaction was not finalized immediately, it took 2 days for the 50CHF reservation to be reimbursed and final amount billed.
I only got a continuous speed of 35kW, but not sure if it was the car or charger limiting.
They have still not added any additional signage. It's probably not too bad, since every other parking space is labelled and these ones aren't, nobody is supposed to park here (the public spaces are blue). But they could just easily make signs in the same style as the town hall and just put the EV symbol on them.