My family and I had a nice and comfortable stay at Valeria's place. The apartment seems newly remodeled and it is fairly well equipped. Everything was clean, neat and tidy. Since we visited Naples amidst a heatwave, having the air conditioner was greatly appreciated. Although there is a washing machine, we were unable to use it because we didn't have laundry detergent. I feel that we would've enjoyed the stay more if there was internet access, but we knew it was not an included amenity going in. However, it would be great if the host considers adding WiFi in the future if it is possible, since our phone signal was weak inside the apartment . Also, the apartment is located up three flights of stairs, with no elevator access, so keep that in mind if mobility is a challenge.
By far the most important thing to consider is the location of the apartment, which is quite removed from the city center. The apartment is located 10-15 minutes away from a small train station (Poggioreale) where you can take a train to and from Napoli Centrale (5 minutes), but the train does not run that frequently (every 40-50 minutes) or late into the evening. Bus 169, which you can take to connect with other public transport options, stops right by the apartment, but we quickly learned that it was not a reliable option, as the bus rarely came on time or at all, especially late at night. The most reliable option ended up being the trolley (Line 1), which can take you as far as the port. The stop is a 10-15 minute walk and because it is the trolley's first/last stop, it tends to depart right around time and often arrives early. However, once again, it is not an option if you are trying to get back late at night. If you plan on staying out late during your visit, it would only be possible if you rented a vehicle/have car access or are willing to pay for a taxi. We didn't see much of the neighborhood---which I'll admit wasn't the nicest---but we felt pretty safe, mostly because we rarely ran into anyone as we walked around.
We were greeted by the cleaning lady when we arrived. I don't know if I met Valeria herself (there is a family who lives across from the apartment who greeted us as we left), but she seemed like a very kind and pleasant person when we communicated over messages. She was very responsive and available throughout the day. Overall, I would recommend Valeria's place if you are looking for comfortable and safe options and don't mind being away from the city center.