Directions given from Caterina were great, apartment was then very easy to find! We were met by her niece who also showed us where the closest shop is (which is conveniently very close).
Apartment itself is in a perfect location. Street could get a bit loud at night but nothing crazy. Apartment was very clean, spacious although quite dark. That was the only thing I didn't like but it really didn't affect my experience.
Caterina is a great host, got bread, butter, jam, milk etc for us and was super sweet. She is in the apartment next door but she doesn't come check up on you or anything. She's very respectful.
I recommend Caterina's place to everyone. Also Venice is a gorgeous place! Beautiful!