The apartment has an excellent potential and could be a great place to stay, however our experience was severely destroyed by 3 factors:
1/ insects: the apartment is clean, however the moment you open the window, dozens of flies enter the room and start flying around. In the evening also mosquitoes were disturbing the sleep. Tiny ants were walking on the floors in the bedrooms. But the biggest problem was that our baby got bitten on the face, neck and head every night by some insect - we couldn't find what. If you don't open the windows, it gets very humid and heavy-aired, maybe because of the water leaks in the living room and the laundry room. So the dilemma to keep the windows open is quite hard one.
2/ the noice - the description does not mention the fact that the inner courtyard of the apartment hosts 3 restaurants, one of which directly below the bedroom. So if you expect to have quite afternoons and evenings, you won't get it. Ironically, the house rules require guests to be quiet between 14 and 16 and after 22h - this is precisely the time during which you hear loud music, loud voices and disturbing noices. Even after the restaurants stop serving clients, you hear moving chairs, trowing trash, table cleaning etc. In the weekend it is more extreme - saturday night the underneath hosted party with loud music and sreams until 1 AM. Not really pleasant with constantly waking up and crying baby.
3/ location - even if the apartment is located very well in Ortygia, the inner courtyard and the passage are quite disgusting - full of trash, cats excrements and rotten cat food. So every time you go in or out of the apartment, you have to pass by 20 meters of such cloak. The owners of the courtyard should really put some efforts to keep it clean.
Otherwise the apartment is very well designed, spacious and well equipped.