We stayed in Angelo's place for 3 nights in December, and it was wonderful!
The location is great, right in the heart of Naples and close to metro & funicular stations. It is also within a walking distance to almost every attraction of Naples.
The apartment itself is very modern and it includes a nice kitchen and dining area, modern bedrooms and comfortable bathrooms. One downside is that the apartment is a bit small and it doesn't include a living room, but that wasn't too problematic for us.
Angelo was super nice, friendly and kind! He left all sorts of surprises and perks for us in the apartment which were very useful.
The communication with him was also great - he was very responsive to messages and requests.
I would definitely recommend staying at Angelo's place when in Naples.