We loved Marco's apartment. Marco met us at the vaporetto station and walked us to the apartment, a short two minutes away. So easy!
The apartment is very close to St. Mark's Square, but far enough away that one is not over run with tourists if you turn right instead of left. If you like to cook at home there are markets and shops nearby.
Everything about staying at Marco's apartment was easy. Marco was easy to communicate with, the vaporetto were out the front door, great sights were around the corner. I would book this next time was in Venice!