I've just stayed there for about 2weeks. First of all, Toni is a SUPER good host. He is nice, and hardworking. In the first day I arrived Napoli, I don't have network with my phone, and he wait 2hours in the plaza for me and it was raining heavily !
The place is very easy to get to, and the apartment is big and clean.
In the days I was staying there, Toni tried his best to introduce place for me to go to, and teach me how to go to the destination I planned to go. There is many many books, maps, and so on in the house, u may borrow them when u travel. If u like museums, u will like Toni because he is a real art lover and may discuss art with. And the roommates there were nice too.
I stayed in a room with 2 beds, but most of the time I have my private room. Even there was somebody sharing the room, it is big enough that u will feel comfortable.