The apartment is very nice, and it was bigger than what we have anticipated when looking at the photos. The rooms (bedrooms and kitchen) are quite large and confortable.
The equipment is very complete and perfect for a complete family.
The location is very good : 10 min walk from the train station and 2 min from the S. Toma Vaporetto stop. However, the location on airbnb's map is not accurate. For a more precise location, search for the Bottega del Caffè Dersut on Google Maps.
We were in april, and the weather was not so good, so the apartment felt a bit cold. I think in summer, the freshness of the marble on the floor could be much appreciated. During winter, the heating should compensate.
Concerning the noise, the apartment is indeed above a café that could be noisy, but the bedrooms are on the opposite side of the building and are completely quiet.
To conclude, and in spite of my remarks, we really enjoyed our stay there and we will certainly like to stay there again when coming back in Venezia.