Nice apartment, very clean and well-equipped. Beds are confortable enough. We were 3 people but it is perfect for 4 people as well. It is very well located, near to piazza san marcos (about 10' walk) and in a very calm and silent neighborhood. we found it very easily and even though we didnt meet Francesca, communication with her was very fast and easy.
Just note that if you go with old people it is a 3rd floor and there is no lift.
Highly recommended to stay in Venice.