We had a great time at the Ca Monastero apartment.
The place was spotlessly clean and in a reasonably central location.
It was a little quieter than the hustle and bustle of San Marco. We enjoyed it so much that we added another 3 nights onto our stay.
The Views on Venice team were good and met us off the water bus to take us to the apartment. They were able to get us into the building within half an hour when we managed to lock ourselves out.
The main downside was that the apartment was cold in the early evening. The heating did not come on until later. The safe deposit box was also not working.