The apartment is nice and looks like on the pictures, it was clean and it's walking distance from the city center (5 min) from Castello Ursino. The check in was flawless and Angelo was very helpful and gave us exhaustive instructions, even videos. He was also very caring and frequently checked in on us and offered assistance.
Apartment is on the ground floor, so if you forget your window open by mistake, you hear everything that happens on the street (which for some reason includes frequent scooters honking even at night). But with closed windows it's fine.
I was not really careful to read the description of the apartment, so I did not notice that it is located in the oldest oldest quarter of the city. It's indeed very old and quite dirty. In addition, there are no supermarkets really close to the apartment.
The general experience was good and the apartment matches the description 100%.