Ca' Barbara is a wonderful and very comfortable apartment. It is ideally located for exploring Venice and not too far from the Biennale (which was the purpose of my visit). It was spotlessly clean and very well equipped. The extra outside spaces were also fantastic and really make this property a lovely place to stay for longer periods of time. Barbara was always very helpful during my stay.
I would have recommended Ca'Barbara without hesitation for all of these reasons, however I feel I must warn other travelers about the extra costs that Barbara charged me.
As a student working at the Biennale for 5 weeks I rented this property so that I was able to have some friends and family to stay, never exceeding 3 people in the property at one time. A week before departing Barbara charged me an extra 2,000 euros for having 3 additional guests on top of the 3 family members mentioned in my initial booking (each only staying a few nights). I had no other option but to pay as there was nowhere else to book at such short notice and Barbara threatened to cancel the booking if I disputed the payment. I was entirely honest about who was staying and when, so was extremely shocked by this ultimatum. The flat and sheets were cleaned once a week, as expected, but the extra guests did not incur any other inconvenience to justify this huge extra payment. Despite asking twice, I never received a breakdown or clear account of the costs.