Great location. I don't think we could have found a better one.
Alessandra met us at the vaporetto stop, and it was extremely close to the apartment. The apartment was very nice, but there were a lot of stairs required to get there. I'm finding that's the case with lots of airbnbs in Italy. :)
We were never lost, and were so close to the Rialto bridge. We just followed signs to the Rialto market (Or San Marco's, if we wanted to go in the opposite direction).