Federico and Vittoria's home in Naples is absolutely lovely! My family and I loved staying at the flat in downtown Naples, and everything about it was great - from the decor (incredible), to the cleanliness (spotless), to the hosts (amongst the kindest imaginable). It's a great place to retreat to after a busy day in the city!
The only concern for some travellers may be the location, and in particular the noise level of the neighborhood. During the day this is less noticeable (the neighborhood is somewhat rough but perfectly safe), but at night the road in front of the flat, as well as the buildings behind, can get quite noisy. For light sleepers, this may be worth considering.