The apartment was very nice and very clean.
This is a basic one room setup with a small kitchen area, a living room space with TV, an area with a bed and a bathroom.
Everything you need for your stay in Naples is provided. There is a metro stop nearby which you can use to get to all the major sites.
Elisabetta was very helpful. When we had questions (about Napoli) she answered them quickly. She also arranged to have a taxi pick us up when we left.