We had a great stay in Venice,Macellos apartment was very centrally situated and provided comfortable accomadation for our party of 4 adults.
Although Marcello couldn't meet us he arranged for his friend to meet us and take us to the apartment.
Although we never got to meet Marcello was in constant contact in case we needed anything and was very helpful and obliging.
Should you be driving to Venice I recommend park 2000 just outside the city at less than 5 Euros a day and bus ride into the city.