Amazing apartment! We stayed here for 3 months over the summer and had the best time ever.
In terms of location it is excellent. Right in the heart of Vomero which is gorgeous, less tourist-y with excellent places to eat and drink within walking distance. A short walk to the tube/metro and just a couple of stops and you are in the Historic centre with all the great museums/galleries/churches and historical sites, a couple of stops further and you are in the port with ferries to the islands. It is also an easy walk to Chiaia which is more fancy for nice restaurants and shopping, with the beach Bagno Elena also there (which you can walk to).
If you are working the internet is excellent (500MB) and there was easily enough space for two people to work from home with our dog to enjoy the flat. The apartment is very spacious, with a balcony and air conditioning.
Francesco was a very nice host, the apartment was very clean and fully stocked with some nice food/treats for us which was a nice touch. He is super responsive and the whole process was a dream.
Would recommend Naples, Francesco and this apartment 10/10!