Positives;
1. Very tastefully decorated with lots ofbcharacter that feels homely, a great base for Napoli.
2. Balcony with an amazing view, specially during sunrise.
3. Good location in a nice neighbourhood.
4. Excellent value.
Negatives;
1. No real negatives, just be aware you need to go up stairs as there's no lift, but in my experience this is quite normal for Airbnb's in Italy.
2. Although the location is not walkable to the main attractions, it's walkable to a metro station and it's a very enjoyable area to stay in.