Mimma is a great host: friendly, flexible and very clear and fast in communication.
The flat is awesome: clean, good location (close to shops, restaurants and the metro) , great view and equipped with everything you need. She even had ice cubes, food storage boxes or deck chairs and let us do a later check-out as we had a flight in the evening and she had no guests arriving the same day.
The rooftop terrace is the perfect place to relax. In general Naples is a loud city, so it is also not a quiet neighborhood.
I highly recommend staying in Mimma‘s flat.