Marco was very reactive and the communication was always easy by phone. There is all the necessary in the flat. But when we arrived at 8:30 am (after a night in a bus), the temperature was just 14 C° and at 9 pm, it was only 18 C°.
It would have been great to put the heating system on earlier, the day before our arrival.
Because we can't see it on pictures online, one must also know that the bedroom didn't have regular windows (just inner windows overlooking the kitchen space).