I spent 3 days in Napoli, together with my sister. Chiara and Ciro's appartment is very well located , the access to all major points of interest is easy, even by walking. The area in the old city center is very typical, and I think it is a must-see in Napoli.
The studio is well equipped, and everything is clean, it corresponds perfectly to the description in the add. Chiara was very helpful, and gave us some useful tips on how to best get to the appartment from the airport, as well as prices we could expect for the taxi fare. Overall, a good experience, and I definitely recommend this place for a 2-3 days stay (or longer).