My husband and I stayed at Margherita's place for the beginning of our honeymoon and we could not have chosen a better place to stay.
Firstly, Margherita was very welcoming (which was very pleasant to arrive to after 30 hours of travel). She helped us with directions to get from airport by bus to the island and met us at the bus stop; had organised a porter for us to help with bags (only 10€) and walked us back to apartment.
The apartment itself is lovely, clean and quiet. Only a 20 min walk to San Marco Square and whatever you see in between. It also has to be said that the bed is extremely comfortable- also good after 30 hrs travel!). Lovely cafes and restaurants around the apartment.
We highly recommend this pace!