The most important word to describe Giovanni's place is CENTRAL location. Couldn't be better! Just around the corner from St Mark's square. Walkable everywhere. We used the vaporetto only to get to other islands. All water bus lines, including the Alilaguna (the airport transfer) stop at St Mark's, 3 minutes from the apartment.
The place is newly renovated, clean and quiet. I would recommend the owner to get some items, like a good knife, cutting board, microwave and toaster, so it will be more comfortable.
Zaira met us at the water bus station, brought to the apartment, gave all the necessary information and even walked us to the closest supermarket so we won't get lost.
I would definitely recommend this place to my friends.
Thank you both, Giovanni and Zaira!