We (two adults, one teenager) fully enjoyed our one week stay. Sandro kindly picked us up in time at the vaporetto station, gave us helpful hints (free entrance to the gallery the first Sunday a month!) and was also approachable during our stay. The apartment was entirely as shown on the pictures (very stylish). Both double beds had nice, firm mattress, everything was clean. It is located at a quite campo and was very quite inside as well (much appreciated for a good sleep). We enjoyed the extra spacious shower (with colourful led light), even equipped with a hamam, for which Sandro kindly provided even a range of scented oils. Using the aircondition helped to keep the rooms cool. The kitchen was good equipped for the one or other snack and coffee.
After having walked around Venice for a week, we think that the apartment location in Dorsoduro near the Campo S. Margherita is the best you can get (at least for our taste). The Campo and the entire Sestiere is very nice and full of bars and restaurants. It is a pleasant 5 minute walk away from the Vaporetto station Ca Rezzonico, 10 minutes from the bus terminal (way back to the airport). It is a good starting point for walks or Vaporetto rides to all four directions. You can walk to the Zattere (waterfront), are just a hop away from the San Marco area and can walk further to the nice area around San Zanipolo church towards the northern rim of Castello.
We would recommend to use the water bus for at least one trip to or from the airport. For us it was the perfect starting point to get into the right mood for our stay.