The apartment is fantastic with a great location close to the historical district and train stations. The neighborhood is authentic and lively with a treasure trove of restaurants, pubs and shops, not to mention the museums and Pompeii. The place is even better than the descriptions given on AirBnB. I stayed at Elisabetta's with my wife, son and his friend and we all loved the place and wished we could have stayed longer, unfortunately she was heavily booked (and for good reasons) if you see a few days in her schedule, better jump on the opportunity.
Elisabetta was a great and understanding host. I let my son talk me into using his phone as a wireless hotspot instead of buying a SIM card for my phone while on the trip. Consequently I was very limited in my abilities to communicate with Elisabetta, actually I was terrible about it and she was very patient and understanding (thank you so much Elisabetta!) One of the worst parts about my poor communication was that I missed the fact that she could offer guided tours of Pompeii...we really missed out on that one, I didn't catch it until we had already taken a guided tour of the Architectural Museum and Pompeii, if she is available, I would suggest you take that opportunity as well.