Awesome place! The terrace on the top floor is really amazing. It is huge and offers a great view over the piazza. The piazza is one of the main areas of night life in Palermo and when you go out, it is also pretty convenient to just go up, use your own bathroom, grab a drink from your fridge and go down again. The only thing you need to be aware of is, that of course at least on the weekend some noise comes from the piazza, so if you want to go to bed early that might not be the best for you (you can close the windows to the front, there are windows facing the yard). In general the location is perfect, beside the bar area, also the main historic attractions and the sea are in walking distance. On top, the train station is easy to reach by feet, which helped us a lot, because we had an early flight and need to take the train for the airport. Everything else you need is right there, restaurants and supermarket just around the corner.
As you can see in the picture, the apartment is small, but the kitchen is fully equipped and you anyway are only on the terrace or outside.
The hosts were also very nice, easy check in, drinking water waiting in the fridge on arrival, and we got immediate help when we had a little problem.
Usually I try new AirBnBs when I am in the same city again, but I think next time in Palermo we will stay at this place again.