It was okayish. The apartment is situated centrally in the city center and is easy to reach from the airport. Take the Alibus (5 euros one-way ticket) to train station Garibaldi and get on the subway Linea 1. It’s only one stop to Duomo which is located just in front of the apartment building.
Communication with the agency is okay, although sometimes you won’t get an immediate response from Rosa, but all of the sudden Luca was texting and he was not aware of the communication with Rosa so you have to explain your travel details again.
The apartment building is really nicely renovated. The concierge on the other hand was not nice to us and you have to pass him every time you go in and out. We tried greeting the man a few times but he just turned his back while standing only one meter in front of us. Only when his boss was visiting did he try to greet us with a generous buongiorno.
The price of the apartment is very reasonable, given it is located in the centro strotico.
There where other things that were not so great. We didn’t mind them that much that we felt the need to complain about it and ruin the holiday-feeling, but what follows now you might want to take into consideration:

The apartment wasn’t very clean but we used the telescopic broomstick hidden under the kitchen sink to get rid of long black hairs that where everywhere (also one on the bed pillow). The bathroom was not properly cleaned hygienically so we had to give that an extra rub. Luckily we brought some cleaning cloths as a precaution because there weren’t any in the apartment. No kitchen towels as well, so do keep that in mind if you are planning to use the kitchenware. We stayed 9 days so from time to time we didn’t want to eat out and had to cut a bread while there is no decent knife to clear the job. Also, you can get excellent coffee everywhere but sometimes we wanted to brew our own. Try doing that with a small percolator that isn’t suitable for induction cooking. It took some experimenting but here’s the trick: you have to brew Au Bain Marie, using a small layer of water in one of the bigger pans.
If you want to enjoy a glass of wine, don’t forget to bring your own bottle opener. Also: no wine glasses and only two water glasses.
We forgot to ask where to put our garbage but it soon became clear that everybody dumps it on the streets. Don’t hesitate to do the same! It’s part of the charm of Naples, just like the smeared out dog poop on the pavements and the homeless people sleeping just on the sides of the building. Wisely there are rat traps spread out all over the city, also in the courtyard of the apartment building.

Now for the sleeping situation: from the very first night on make peace with loud noise, otherwise you won’t get any sleep. The only time there was acceptable street noise was on sunday nights between 3 and 6 in the morning. Other times the carousel of honking cars, scooters and yelling people outside goes on and on. Consider bringing earplugs or noise-cancelling headphones. From time to time you might want to open your window for fresh air. Sorry, there isn’t any: exhaust fumes are a part of Naples and will fill the room.
There are only window shutters on the outside, no curtains so the room lights up at night like there’s a never ending full moon. All thanks to the ultra-powerfull white light of the Tezenis-shop on the street corner down below. By the way, the whole apartment is fitted out with bright cold white Led-lighting that makes you look ugly and old: bring some coloured scarfs to throw over the lamps.
As for the beds: the mattresses are hard and don’t have a cover: there’s only a thin sheet between you and the bed, not very hygienic but hey, it’s a holiday don’t get worked up about it.
Just enjoy Naples, it’s a great experience! Thank you Rosa!