It's very difficult to add anything to the excellent reviews and feedback that Luca gets from everyone who stays at his apartment, so apologies for the repetitiveness!
The apartment is beautiful, clean and comfortable and could not be located better for visiting the Biennale. We arrived by vaporetto and were met by Luca's lovely mother, who took us to the apartment and showed us around. We ate out most of the time, but stayed in on one night to cook at home, and the kitchen was good and well equipped. The bed is large and comfortable, and the apartment warms up quickly when it is cold outside (as it was every day we were there when the sun went in). The neighbourhood is great - there's a nice little bakery downstairs for breakfast and good pizza up the street. There are also plenty of delis, market stalls, a supermarket, chemist and post office on nearby Via Garibaldi, so you can stock up easily. There are also a couple of nice bars there too. You virtually roll out of the door into the Giardini, and the Arsenale is only 5 mins in the other direction, so for the Biennale, there's no beating it. It is also only 10 mins walk to Arsenale vaporetto stop, which takes you directly to Marco Polo airport.
We've been to Venice a few times and this really is the best place we've stayed by some distance. It will be the first place I look for next time I'm going. Thanks Luca!