We had very pleasant experience staying in Andrea's apartment. It's located near campo ghetto, very quite but close to many shops and restaurants. A supermarket is only couple minutes walk away. The apartment was very clean through out and artfully decorated. Kitchen was new and fully stocked. Ac and wifi both worked well. One thing I have to point out is that one of the single beds was a cot, not a real bed.
We walk everywhere from the apartment. Santa Lucia train station is about 15 minutes away, St. Mark's square and Basilica Dei Frari are 25 minutes, and the magnificent Accademia is 35 minutes. If you don't feel like waking though, the water bus station is only 5 minutes away.
Andrea was very attentive host. He sent us information before we arrived, left maps and guided in the apartment and answered every question we had. We'll definitely book his apartment again next time we go to Venice.