I had a really comfortable 11-night stay at Calvin's place. His place is just across the Metro convention centre, which is very convenient for my daily 7am-6pm conference.
It is also only 10 mins walk from the new express train from the airport (use the entrance near the Hotel Intercontinental).
It's very central, close to the King/Queen streets for shopping and restaurants, St Lawrence market, CN tower, aquarium and the stadium. It's very recommended!