Most importantly the apartment is in a good location, it is functional, roomy, check in was easy and the price was reasonable. Venice is a place where there is such demand for accommodation that you could probably rent a dog house out for good money, so finding one that ticks these basic boxes is a plus.
Francesca was always responsive to my messages and provided good detail on how to find the apartment. She also arranged for a baby cot and high chair for our 15 month old.
The apartment is on the second floor but is serviced by a small elevator. You can see a bit of a canal from the windows in the lounge room which is nice.
St Mark's square, the Doge's Palace etc. is a couple of minutes walk, a few minutes more gets you to the water busses. In the other direction you can walk to the Rialto Bridge in about 10 minutes.
There are restaurants galore no matter which way you walk. And there is a grocery store about 5 minutes walk away which is great if you want to stay in and cook something yourself (the kitchen all worked fine).
It did get a bit cold in the apartment but, due to local laws, the heating did not switch on. Francesca explained that it is turned off in mid April which is unfortunate. If it is your first time in Italy you will probably notice that the bureaucracy is a bit excessive (e.g: pictures of your passport are taken, a tax per adult/per night is payable, and in this case telling you when you can and can't use heating). All of this is out of the hosts control but I think it's worth mentioning. Francesca did offer to bring more blankets but we made do with what we had.
A couple of small draw backs was the double bed is actually 2 single beds pushed together which isn't that comfortable for couples.
The guy who showed us to the apartment complex (which is about 10 meters from Francesca's husband's hotel) stood at the door as though he was expecting a tip. We are Australian, and from what other Italians have told us, it is not customary to tip in Italy either. After an uncomfortable stand off I indicated he could leave, twice! I thought this was a bit cheeky. Perhaps he mistook us for Americans?
We have stayed in numerous Airbnb's across 6 counties for business and pleasure. Given our experience I would say that this place rates well on the things we look for in an Airbnb. All in all I'd recommend you put this place on your short list.