I would ONLY recommend staying at B&B Camera Venziana for people who are completely fine with this being an apartment entirely for (Air)B&B. In other words: You are not staying at someones home; instead, there are 3 rooms, each one being rented out. Thus, there is absolutely no connection to the local environment, nobody to speak to, and nothing "homey" or particular. It is rather like a (better) hostel. People come and go, and some oner guests don't even bother to greet you.
However, the room is clean, and the two shared bathrooms are decent. The beds are very big. There are no extra blankets for the beds, and you can't adjust the heating yourself. We also couldn't open the blinds to the balcony, so we couldn't get the light into the room, which is quite a bummer if you want to spend time indoors (it was raining heavily). There is "breakfast", but it's simple Italian-hotel style: Crackers and croissants, each wrapped in plastic, small jars of jam. Nice coffee, though!
For a one-day Venice-visit, or for business people, this might be just perfect & really god value for your money. For a longer stay it might feel a little empty & lonely.