We stayed for 5 nights at Roberts apartment at one of the Carnaval weekends. It's a sweet tiny apartment for couples, who seek to spend most of the time outside. The location is superb!!! Only 3 min walk to San Marko, less then 10 min walk (no bridges and stairs) to vaporetto stop. Very convenient with the luggage. There is also a small lift in the building, which is very useful. The view from the tiny smoking balcony is great, just over the canal. The apartment is in center of everything - 10 min to Rialto bridge, 15 min to Via Garibaldi etc., and yet it's in very quiet alley.
It has a small kitchen for making breakfast, bathtub with hot water any time of day, enough room to put your belongings. Make sure to ask how to turn the heat on, cause it took us one very cold night to find out:-)
We have not meet Robert, but his representative - Laura - met us at the vaporetto stop and took to the apartment. She is very friendly and pleasant. The communication with both of them was good.