Place is very, very good. Cozy, quiet, small but functional. All things in bathroom worked perfect, as well all amenities.
Giampiero was very polite, he was available all the time, he had very good tips and advices for staying in Napoli. The neighborhood is decent, the doormen was very polite and helpful. Location is very good, lot of attractions can be reach on foot, and two metro stations are very close (Margellina and V. Emanuele) if you don't want to walk. Few supermarkets and restaurants are close by, Giampiero gave us a very useful list.
Only problem we had was temperature in the apartment. This period we been in Napoli was maybe the coolest this season, with cold wind. Apartment was cold when we arrived, radiator was on, but not so hot and it was impossible to make solid temperature. We switched on air condition, and we had to keep it on all night.
Anyway I would recommend this accommodation for even longer stay