We stayed at the apartment in August 2021 and have been disappointed by the room. The neighbourhood is great and the terrace as well as the living room is very nice. But absolutely everything inside our room has been dirty (floor, shower, bed sheets, towels). Also the water has been stone cold the first day - until the owner told us to turn on all water taps at the same time to have warm water... We also think it should have been mentioned that the appartment has 5 or 6 rooms, which means that it is shared with other people. That's certainly not a problem, but it should be mentioned in the description.
If somebody does not care about the room itself AT ALL, this a a good place to stay. The location in the historic center is perfect with most of Naples' highlights within walking distance. The communication is also pretty good - the agency (or owner?) is responding very fast. But we cannot recommend the room itself. It's too dirty, the entire furniture is very old and shabby. The room just has a tiny window on the floor (!) and the bathroom does smell pretty moldy. With all those disadvantages the room is just too expensive. There should be better options with a similar location in Naples.