To put it simply: we had some good experiences with AIRBNB, but this one was really the best so far.
Communication with Carlo, who was not in Venice at our stay, worked well and quickly.
We lived in Carlo's apartment for several weeks. The apartment is modern and tastefully decorated, absolutely quiet, cool (sometimes important in Venice) and overlooking an old monastery garden. It has a well equipped kitchen, so you can buy your food in the neighbourhood or on the Rialto market (10 Min. away) and cook for yourself if you like.
The best thing for us was the location of the apartment: on the border of the Sestiere Canareggio and Castello, 3 minutes from the beautiful Miraculi Church, very central, but away from the tourist crowds, so you have the chance to get to know something of the real Venice. We hope to return soon!