Davide was a great host. Very good communication and helpful. He organised a car to take us to and from the airport. Public transport is possible, but, as we discovered, public transport in Naples is not the most reliable in the world so we were happy to use taxis for airport transport.
The apartment was great - relatively quiet for the Spanish Quarter (there are other areas if you truly want peace and quiet, but the Spanish Quarter is full of life - it all depends on what is most important for you. The views were wonderful - particularly at sunrise. It was great to have our little balcony as well.
The sofabed was very comfortable and worked well. Everything we needed in the kitchen.
It was walking distance to many of the places we wanted to go - but beware of google maps telling you a distance - there are so many hills that it doesn't factor in to the equation!
All in all, a great experience.