We loved Pietro's place! It looks better in person than in the photos. It had all the amenities advertised and more. We felt very much at home at Ketty's place. Our only regret was that we left too soon.
We were welcomed very warmly by Ketty, Pietro's wife. She gave us an overview of the city through a local map and told us where the essentials were. Her place is close to the Frari church, with a lovely view of it outside the living area and bedroom windows. It was central and everything was walkable from their place.
I would recommend this to everyone wanting to come to Venice!