Giovanni's place is just like you see in his ad, it's a very cozy house, comfortable, and well equiped to spend some days visiting Napoli and surrounding area. Terrace is absolutely awesome!
It's close to Piazza Garibaldi (5 minutes walk) and to public transportation, around the house you can find supermarkets, bars, various types of restaurants (trattoria, pizzeria...).
If you are going to Napoli i recommend to stay at Giovannis place.