Ileana's place is just beside the city centre and you can definitely visit most of the tourist attractions within walking distance. There are a couple of wonderful cafes and pizza stores near her place that open till late at night. So do not worry if you are craving for some late night snacks. It would be much better to travel if you know a bit Italian, but you can still communicate with Ileana in English. She has been nothing but a charming and thoughtful host, it was a shame that we weren't staying in Naples much longer.
btw, there is a market opening everyday(?) just beneath this place, good place to get yourself some fresh fruits and vegetables.