Annita's place is the perfect place to stay in while you are visiting Venice: it is very near St Mark's square and all the other places of interest are within a short walk.
There are lots of restaurants and cafes very nearby, as is the Vaporetto stop.
We stayed for 5 nights, we visited the Bienalle - which was only a 15 mins walk.
The response from Annita was very quick, we managed to communicate through Italian/Spanish/English!
Her house is spotless, the bed very comfortable, the towels are big and fluffy! and although very central - it was quiet during the day and the night because it is inside an internal courtyard.
All and all a great experience. Warmly recommended!