We arrived with kids about one hour late due to train complications. Grazia was super helpful and guided us by phone to the right water buss. When we got lost in the streets (GPS is not reliable in the tight alleys of Venice) she guided us to the door. The apartment is truly in the heart of the city but the street is quiet except from some restaurant cleanup that happens every night at around 23.00, but that's just part of the charm of the pulsating streets of Venice.