Marcella is a great host, she gave us all the advices to come from the airport to the good vaporetto stop. Her friend Riccardo came to meet us and took us to the appartment. They were helpful for everythnig, giving us tips to visit Venise or for good restaurants.
Everything was perfect and their place is perfect for a couple visiting Venise, and a quiet place, without too many tourists but really close from St Marc (10 min walking) and Rialto (10 mion walking).
thanks again to both of you !
Benoit