I had a great stay in this lovely apartment. The central location is really convenient for exploring. You can reach many sights on foot (including Piazza S. Marco and Ponte di Rialto) and it's also within walking distance of the main train station and the ferry terminal to the islands. The Ca d'Oro ferry stop is almost on your doorstep, and the flat is on a main street with plenty of restaurants, shops and a supermarket nearby. As such, it isn't the quietest area to stay in if you're hoping for a peaceful place away from the crowds, but it is a very nice area and great for reaching all the main attractions.
Cristina and her son were great hosts. They sent useful information and responded to messages promptly, and I was met at Ca d'Oro ferry stop on my arrival and shown to the flat. The flat was clean and homely, and a great place to relax after a day of exploring Venice.