Pros:
This place is huge. We were only two people staying here, but you could easily fit 5 people. The closets are huge also. The whole place is clean and decently nice. The area is cute, very authentic Italian. The Plebiscito Square is a 3 minute walk away with shops and restaurants.
Cons:
The wifi did not work. He only bothered to install it on our second day and we still were never able to get it to work and believe me, we tried. We had to text him a few times to try and get all the necessary passwords but he only responds every couple of hours and is not clear.
We stayed three days and never saw Guiseppe once. He had his colleague meet us to let us into the apartment and she was nice but didn't speak one word of English. He did not send us any follow up messages or provide any information about the city. We were really on our own to figure things out which was difficult without wifi. We ended up spending a lot of time and money at Cafe Gambrinus down the street just so we could use their wifi. Oh and then two repair men came into our apartment one morning while we were still in bed! No warning from Guiseppe whatsoever. That was an interesting surprise.
If you do come to Naples, I recommend a day trip to Pompei and the hike up Mount Vesuvius. It was the highlight of our trip.