I've been using AirBnB quite intensively since 2012, and without any exaggeration, it was my best Airbnb experience.
Everything was simply great. The location is very central and very Venetian - with the street ending up in the Canale Grande. Old palazzo nicely renovated inside with all necessary equipment one may think of. The apartment is a bit dark in spite of many many windows - but this is part of Venetian life amongst narrow streets. Very very cosy inside! I didn't notice any typical problems linked with humidity, and this is also great.
The host replied rapidly providing very detailed information, met me at the boat station so I did not have to search the right palazzo in the endless labyrinth of Venetian calle and in general treated me as a good friend.
I definitely recommend and will try to come back to this place.
Thanks for the great stay!