@Nuno60
My worst nightmare was a French couple at Christmas. It seems that they did not give the PlayStation to their grandson, and he did a terrible revenge for them-sent them to apartments that are not suitable for them at all.
They did not know how to connect your iPad to the Internet, they don't know how to use geyser coffeemakers, which is almost a hundred years in every European family, were not able to raise and lower the blinds, turn on the stove, and of course they never spoke English and did not use instant messaging, and airbnb too. Every day, several times from 9 am, they called me and I realized that I needed to come to the apartment and help them with some basic question.
They needed a hotel with 24-hour reception, of course.
That's why I prefer young people, at least they all know how to use Google.)
Reasonable questions BEFORE the trip I welcome, it is much better than eating my brain after arrival.