We stayed 3 nights at Valeria's place in Napoli and had a great time.
Piazza Amedeo has an amazing view of buildings higher up on the hill, and lots of shopping and some good food near by. It's a close walk to the oceanfront as well.
Many things we wanted to see/eat were far from the Airbnb (about 45min walking) so we rented a scooter and got to experience the chaos of the roadways! I would only suggest renting if you are a comfortable motorcyclist as the driving is the craziest I have witnessed so far in Europe. But with the metro station directly beside the apartment I'm sure that would also be a great mode of transportation.
I would highly recommend Pizzeria Starita and making the trip to Herculaneum for a tour (we enjoyed it more than Pompeii!).
The apartment was beautiful and we felt very safe walking around the area at all hours.