To start, the amazement of the terrace is undersold. you are not near Basilica Reale Pontificia San Francesco da Paola, you are literally on top of it. you can touch the main dome with your hands.
Kitchen is well stocked and there is coffee, sugar and small cooking elements. The host provided a nice bottle of wine which was a good touch.
The apartment is not large so a couple or single person is fine but I would not recommend adding an extra person in there. Otherwise it is clean with a comfortable bed and well maintained.
There is no elevator, so if accessibility is an issue you might not want to do the 3 flights. For me it was a nice way to burn off a pizza Slice or two.