Pros: The apartment is in a perfect location if it is your first trip to Venice and you want to see the most famous sites (the downside is that it is a bit more like staying on Rodeo Drive than an authentic neighborhood).
Silvia had one of her associates meet us and she was a real pro - punctual, personable and a wealth of information.
The apartment is higher end than a lot of other Venetian Air Bnbs and certainly better value than hotels in the same price bracket.
Cons: If you're planning to use the sofa bed have them set it up. Trust me it isn't straightforward. Fortunately on our second day Silvia sent someone over to set it up so we were able to have separate sleeping arrangements for the rest of our stay.
The kitchen isn't well stocked with basics like a cafetiere that makes more than one cup at a time, a working lighter for the stove, an adapter for the electric kettle to fit in the sockets, etc. Very stylish kitchen but it seemed like over time the basics hadn't been replaced.
The biggest drawback during our stay was that the upstairs neighbors were really loud. I'm not sure if it is another rental or if we just had bad luck but our first night they were yelling in the hallway and had a loud party until the early morning and that was repeated twice more during our stay. We come for the Biennale every two years and have really long days trying to fit everything in so it makes a big difference if we can't get a good night's sleep and with the noise from upstairs we couldn't.
All in all it is a mixed bag- good location, good looking apartment, efficient management, but bad neighbors and in need of re-stocking and a few repairs.