Apartment: clean (and I'm really picky about that), cozy, comfy. Looks the same in real life as it does in pictures.
Host: super nice! Friendly, supportive, funny :) seriously, I can't imagine a better host than Massimo!
City: beautiful, crowded, safe! I know they talk Naples is a dangerous place to go, but to me people were friendly and nice, no one tried to rob me :) just watch your belongings and you are going to be alright.