Carla was very clear with the instructions how to find the place and what to expect. She was very easy to communicate with in English (as it turned out not many Italians are :) ) and always available.
Although we had a problem with the hot water, she and her husband made everything possible to deal with it.
The apartment is nice and the neighborhood good and lively. Nearby is the Castle S. Elmo and a splendid viewpoint towards Napoli.
Don't hesitate taking the Funicular downtown - faster than the metro, easier than the stairs :)