The apartment is a lucky pick! I enjoyed my stay there very much.
It is located very close to one of Naples' main roads but you can't really hear the street. It's about a 15min away from the main station, from where you can easily reach the airport or Pompeii, and about 10min from the historical center.
The neighborhood is what exactly what you picture an Italian neighborhood. It is very lively, still at night quite quiet and also safe.
The apartment was very clean and had everything you would need - a fully equipped kitchen, towels, extra blankets, and even brochures on the surrounding tourist attractions. For anything else you can ask Carolina, she is always there to help and an incredibly nice person. She helped me with coordinating my trip beforehand and also with information during my stay.
I can fully recommend Carolina's apartment!