I spent five nights at Francesco's. It was great. The room was a good size, nice bathroom, plenty of hot water. Francesco even left some breakfast for me. Francesco is very nice and friendly. He was very helpful in giving me ideas for sightseeing and restaurants. All good.
To arrive I walked from Garibaldi station, where the Alibus arrives from the airport. About fifteen minute walk. Otherwise take a taxi to Palazzo Caracciolo and then three minutes walk up the steps and to the right for 40 meters. Large brown door on the right. There is a good left luggage at Garibaldi station which is very convenient for the Alibus return to the airport.
People are very friendly in Naples, and with normal precautions for a big city it felt very safe. All in all I had a very enjoyable trip, and some great food !!