Pietro is an excellent host, the photos do not give back properly how awesome, clean and modern the apartment is! It’s literally 10-15 minutes walk from the center (St. Marco square, Doge palace, Grand Canal etc).
One thing: Google map tricked us as the city is very narrow, the mobile internet does not work properly every time. Instead of typing the exact address of the apartment, search for McDonald’s, as there’s only one in Venice, 30 seconds from the apartment. This was a great advice coming from our lovely host, and helped us big time!