We stayed at Ivana's place for 5 days, and had a wonderful experience.
Highlights
Communication: clear, timely, and very responsive. All the info we needed was provided before arrival, and this helped make check-in a smooth experience even after I needed to make a few last-minute changes to our travel plans. I wish more Airbnb hosts were as good at communicating as Ivana. Her restaurant recommendations were spot-on as well.
Location: Giudecca is a ~15 min ride from St. Mark's, which is actually perfect to get away form the hustle and bustle of Venice proper. Giudecca itself has many good restaurants and shops, and it's a relaxing place to walk around. Going to and from Venice is quick and easy using the Hilton shuttle or vaporetto, we never felt like the location had any impact on our sightseeing schedule.
If we visit Venice again we would definitely stay here again.