Our stay at Marco's place was very nice, the apartment is small but it has a great terrace over the rooftops of Venezia, and its location is perfect for visiting the Biennale - as we did - or just visiting the historic center. Marco was very accessible and even though we didn't meet him, he had a member of his staff show us the place and answered all our questions via sms. Overall, I very much recommend Marco's place as an economically viable stay in the center of Venice.