LOCATION: The flat is centrally and conveniantly located at a ~10-15min walk to the city center sights, the archeological museum, 15min to the central station (for trips to Pompei, Sorrento etc.) and 25-30min to the ferries (Capri) and Museo Capodimonte. There are also two subway stops ~10-15min away. We endet up walking mostly, because the metro goes very deep and the stops are not really conveniantly located in the city. The flat is not the top floor of a magnificent (but a bit run-down) mid 19th centrury building and looks to the back into a former monastry park with further views over the city and even a bit of the mediterrean sea. As others have written, Napoli does have a trash and management problem, which is quite sad given its former glory in its not too distant past which you see everywhere. So expect to navigate trash in the streets and if you step too closely to the balcony you will see also piles of trash in the monastry park. But if you look past this, Napoli remains a vibrant and interesting city. There is a 24h supermarket close by and very good pastry places (try Bar Carpaccio and Bakery Antonio Rescigno) and many good restaurants. Given its location, the flat is remarkably silent - we had no problems sleeping with open window doors. But you are of course in the middle of a big city - a few planes start over the flat int he morning which will wake you, the monastry church makes good use of its bells at times etc.
FLAT: Is indeed more spacious that is seems on the pictures. Because of the old and magnificient building you have high ceilings and window doors opening to the balcony. The flat was very clean. The bathroom is also very new and spotless. There is a small kitchen - functional but I would not attempt to do any major cooking. The bed has a good matreess with just the right firmness (for me). The flat is nicely furnished with modern and historic touches.
HOST INTERACTION: Was very smooth. The hosts also ordered a Taxi for our departure day, which helps given the overall business attitude of the Napoli taxis... ;-).
So overall very good value for money and highly recommended. The COVID situation of course changes things a bit, but all sights are open and probably much less crowded than usually. The Covid discipline of the locals is very good - so I hope it remains a safe destination.