We stayed at Roberto's for 3 nights and although it wasn't right in the centre, it is close and transport is readily available from the bus stops that are literally right outside the apartment which was very handy. Taxi drivers also know the road well if you ask them to take you to Via Tasso.
Roberto is the perfect host, he really went the extra mile to make sure our stay was easy and enjoyable. He was extremely attentive to our needs and was very easy to contact..always replied quickly. Roberto lives in the apartment but it is sectioned off from the part you stay in. Each evening he checked on us to make sure we were okay. We even had the pleasure of freshly made coffee one morning with an array of traditional Italian cakes.
Roberto has a friend who you can use as a taxi for the airport but as she wasn't available he offered to take us himself without hesitation..this made our morning a lot easier and quicker as the alternative would be taking a taxi (expensive) or catching the alibus (airport bus) from central station or the ferry port. We were very appreciative! Roberto is also a very good cook and offered to make us dinner one evening and although we weren't able to, I thought this was a very nice gesture. I can't recommend his place enough so if you are planning a trip to Naples...make sure you stay at Roberto's apartment!