My wife and I stayed two nights at Carlotta's apartment.
Overall, it was definitely a good experience. It is in a good location right in the middle of Venice, although it can be tricky to find. Her husband Aldo walked us to the apartment from a vaporetto stop on the Grand Canal which was extremely helpful. He even wheeled my wife's luggage for her. After that I just made sure that I knew where the apartment was on Google Maps and we were fine navigating on our own.
The apartment was very clean, funtional and stylish and had all the amenities we were looking for.