I have to say I cant recommend this apartment enough! Firstly the hosts were amazing, with their communication prior to travel, on arrival and throughout the holiday if we needed anything. It gave us the confidence that if we needed any help - they were there (not that we did!). They also speak very good English!
The apartment was just as described, the location was perfect for getting around, we could walk to the main areas in Naples along with the port, which is probably about 20 mins away.
Inside everything was as expected and the roof terrace provided an amazing location to soak up some sun, or have a beer or glass of wine under the stars. Another main feature is that whilst the apartment is located towards the edge of the Spanish Quarter - its really quiet - sleeping was never an issue. Also due to its locality there are a number of shops right outside the front door selling everything we needed, Cheese, Ham, Fruit, Veg, Wine, Beer etc, there's also a supermarket about 5 minutes away should you need it. There are also a number of restaurants 10 mins walk so it really has everything. The locals are also super friendly - so dont be worried if your Italian language isn't quite there yet.
I'd go back in a heart beat - Naples is an amazing place, we only scratched the surface during our 10 days stay there.