We had a great stay in Palermo! The location of the apartment was perfect for navigating the city by foot and visiting all the historic sites. It was also close to both the train station and a major roadway (no noise tho!), which made travel easy when we left the city. Just be careful of the ZTL areas if driving a car and parking near the apartment. Definitely research this before as there are restrictions and fines if violated.
As others have said the shower is small, but I didn't find it to be much of an issue (I'm 6ft tall). The balcony was really nice for people watching, enjoying a pre-dinner glass of wine, and a view of the marina. We definitely utilized it during our stay.
We would call the apartment size cozy, but it provided all we needed especially since we were out and about most days and nights.
And while there were restaurants and bars in the vicinity that were open late into the evening, we didn't find a problem with noise as long as all the windows and shutters were closed. It is fun to visit on the a weekend as the night scene is fantastic with locals filling up the streets and piazzas.
Would stay again and can't wait to return to Palermo - a highlight of our trip!