This is the perfect apartment for Naples. Great price in a great location. The host wasn't at the apartment but always available to answer questions or help via WhatsApp.
The apartment was maybe 5-10 mins walk from the highest rated fish restaurant in Naples, and some other good places to eat (OWAP pizza place, for instance). Maybe about 15 mins from the Storico district. 10-15 mins walk from the train station and TransVesuvio Express.
The apartment was cleaned daily and water bottles replenished daily. Good shower and air conditioning.
Mattress was firm, but we were out all day and walking, so by the time we got home at night we slept on it soundly. The only thing of note that I will mention is the city of Naples can be busy, that means traffic noises, which you're in a city so should expect that, however Naples is special. On the first night we went to sleep early and got woken up with fireworks about an hour later! That was a shock! But its kind of part of the special fabric that makes up Naples.