Attention: Mould in the apartment.
The apartment is big enough and the location is nearly perfect. But the apartment has some major flaws:
Mould: the wall between bathroom and living room gets wet with every heavier rain. It is ripe with mould. In both rooms you can see and smell it. That alone is a deal breaker, but there is more.
Electricity: the overload circuit breaker is activated when all three air conditions are on. You have to reconnect the circuits and turn one ac off.
Roof: after a short but heavy rain at night, water came from the kitchen ceiling. It was a mess.
Communication: we had contact with three different people. The same questions came again from different people...
Cleaning: when we arrived, the bed was not made. We had to do it ourselves. There was quite some sand on the floor. The dishes were not clean. We had to wash everything before using it. The hosts do tell you to wash all the used dishes before leaving or you pay an additional 25€ (but obviously nobody checks the dishes). They also tell you to take out every bit of trash before you leave or you pay an additional 25€.
All in all it was a disaster. I would under no circumstances go there again. But i will certainly come back to Palermo.