We stayed at Ca' Forcola for 3 nights and it was perfect. Daria greeted us upon arrival, helped us with our bags, and explained the ins and outs of both the apartment and Venice. The apartment is clean, spacious and quiet. Great shower, kitchen, balcony. Reliable wi-fi.
Dorsoduro neighborhood is quiet, with several nice places to eat. We walked everywhere (except to Murano); the railway station is 15 minutes (and 4-5 bridges) by foot! And Mark's is 15-20 minutes away. With a small grocery 2 minutes away, you have everything you need.
We Highly recommend Ca' Forcola.