We stayed at Alessandro's room for a weekend.
Communication from Alessandro was great: the place was easy to find and the key exchange was smooth.
The location is good and the room is nice with a little kitchen which comes in handy for longer stays. He also provided wine and snacks complimentary. The bathroom is shared with other rooms.
We never got to meet Alessandro, as these are a number of rooms being let out in a mini-hotel fashion. The upside, is you really have your privacy, if you are looking for the 'real' airbnb experience (living and experiencing with locals) this wouldn't be suited.