Pros: Very kind and hospitable hosts. Nice list of local picks for food, etc. Well-positioned for exploring old town Palermo on foot. Very responsive communication.
A few cons: the apartment is in the old part of the city (controlled traffic zone), and you cannot drive to the apartment and park close by without a permit. Park on the waterfront instead. (We may get a ticket, after following google maps to parking close by the apartment).
The towels smelled like cigarettes. Overall, perhaps a little overpriced for what you get.