My fiancée and I had a great stay at Cristiana's apartment. The location couldn't be better - right in between Rialto Bridge and Saint Mark's, but just a couple of streets away from the really busy areas.
Great communication and recommendations for food and activities from the host made our stay the perfect few days in Venice.
Note, if the weather is warm (there was a heatwave on during our stay) the apartment will be hot throughout the day and at night.