I stayed at Martins place for around 5 weeks, together with my girlfriend. The apartment is really beautiful, the bed is comfortable, fast WiFi (important for everyone who works from home) and the kitchen has everything it needs. Martin and his family answered any inquiry always super fast, were happy to help and also gave us some nice recommendations.
Of course it is not the owners fault, but at the moment they are constructing a new building right in front, so be prepared and get some ear protection, because they start early :D But I guess in a place like Palermo you will always have some kind of construction going on, so not really a big deal.
In general, Palermo is the perfect neighbourhood for everyone who wants to stay for a short or even a longer period of time in BA. There are sooo many restaurants and bars nearby, I think we only had to use uber about 5 times in our stay and made the rest by walking. It is also really safe, so no worries to even walk at night.