We stayed in Francesca's apartment for 3 nights. It was situated at a very convenient location; 10 mins from the Guglie water bus station (if you are using the Alilaguna to/from the airport); 20 mins from the train station; 15 mins from St. Mark's square.
The apartment had a nice decent-sized bedroom. The bathroom was probably on the smaller side. But after looking at other buildings in Venice, this is probably the norm! Also, we preferred to keep the window shutters closed since there was a restaurant right behind the apartment (though curtains + keeping just the glass windows closed might have been sufficient). Unfortunately, once you closed the shutters, it got quite dark. But we really came to the apartment only at night, so it worked out quite well for us.
This apartment is located off Strada Nuova, one of the main streets in Venice, which had a lot of restaurants, shops, and Gandola stations. This was both good and bad. A nice place to eat was always close by (though probably more expensive). But that also mean't you don't walk around as much! Further, there was also a lot of tourists walking to/from the train/water bus station to St. Marks square.