The apartment is spacious, comfortable, and well-appointed. The building is old and the front doors can be difficult, but this can't be helped in a beautiful old city like Naples! The doors to the apartment are secure. More than enough towels were provided and the beds were warm and cozy, including the bunk bed.
The housekeeper (who did not speak English) welcomed us warmly and she can be contacted to assist with opening the front door. Matteo was very helpful over the phone as well, and had sent us valuable resources for our visit beforehand.
There is good food nearby, and the Naples Cathedral is right around the corner. The streets can be dark at night, sometimes unnerving, but this is expected in the Old Town and normal precautions are all you need to take.
Definitely enjoyed my stay in this apartment!