Federico is a superb host, greeting us at the ferry stop and show us to the apartment, which is just next to the Main Street.
Family friendly, well-equipped kitchen.
Two concerns:-
1) no wifi
2) the boiler (water heater) is not perfectly stable
Walkable distance to saint mark's square. and actually walkable from Venezia santa Lucia train station (around 20 mins) if you're not carrying too many luggages.