I use Airbnb all the time, and have never had a bad experience, but this one was exceptionally good. The location is fabulous, in a great part of Dorsoduro which is easily accessible by public transport and is very walkable, yet quiet and very "local". It's about 10 mins walk from Accademia and 20 from San Marco, and you can walk along the laguna all the way to the tip of the island and back. There is a supermarket nearby, to say nothing of the great shops and restaurants. The apartment was squeaky clean and furnished with absolutely everything we needed (perhaps a slightly more mainstream coffee maker would be a nice addition; also something to addres mosquitos). Great bathroom. Sebastian and Madalina were super-helpful. They gave us very clear directions, and Madalina met us at the vaporetto stop and walked us to the apartment. No issues whatever with check-in / check-out times or keys. All in all, I just can't give them enough praise.