My wife and I stayed at Ca'Martina's over the New Year. Her apartment is impeccably clean, bright with sunlight and warm during the cold winter days. Martina provided everything necessary for our stay - right down to coffee for breakfast - and was always available by email if we needed any help or advice during our trip. The location is also excellent. Just far enough away from all the tourists but still close enough to walk anywhere you want to go.
One thing we don't think is adequately detailed in the listing, is the grocery store (Coop) that is 2 minutes walking away. Venice (apart from the vegetable and fish markets) is a food desert and being able to purchase food/drinks easily is a luxury. We ate fresh burrata every morning on focaccia bread from the deli counter that not only was delicious but also much more budget friendly than eating out each meal.
Having stayed at multiple AirBnb locations across Europe, we can say that Ca'Martina's is truly an excellent listing and we wouldn't hesitate to stay here again!