Leonardo's apartment was a great base for exploring Venice! The apartment itself was very comfortable, with plenty of light and a balcony that was perfect for an afternoon break from sightseeing. The location was very convenient, quite close to St Mark's, Rialto, and the Dosoduro/Accademia area. Leonardo was very communicative, meeting us exactly when and where he said he would and helping us get our heavy bags from the vaporetto stop up to the apartment. He also gave us good recommendations for restaurants and things to do in the area.
The only downside to the apartment was the lack of wifi, but that wasn't a major problem, since there's plenty of free wifi in Venice, including at every cafe.
Overall, a very good experience!