Best location (walking distance to major sites - Duomo sits just 27 seconds walk away), elevator available in the building, good security, clean and cozy (nicely renovated as in the pictures), awesome host (super-responsive and welcoming), supermarket and Eataly just across the street.
As nothing in this world is perfect, one problem we had was the noise coming from the other rooms.
All in all, we had an absolutely great stay at Riccardo's place.