Overall we had a great experience. The apartment is really spacious and is suitable for remote work. The biggest room is equipped with a huge desk and has a great internet connection (I was able to reach 50-100Mb/s). Bathroom and kitchen are also well equipped.
Location wise, it's situated in a quiet part of Naples and we had no problems coming back to apartment later in the night. City centre/metro are also in a walkable distance. However, the climb to the apartment can pose some problems if you want to go out and return a few times during the day. It's quite a long walk upwards :)
Last but not least, Massimo is a great and caring host. Always easy to reach and shares some amazing local recommendations.