We really appreciated staying at Christophe's place during our recent vacation to Montreal. Our primary activities were at the Space For Life museums near the olympic complex and his place was easily in walking distance even for our 3yo (<1mi).
It was fairly spacious and as a family of 5, we liked that there were 3 bedrooms and more than 4 chairs at the table!
My only negative feedback has nothing to do with Christophe. The people staying in the apartment below us arrived after 1am and the stairs are right beside the bedroom we were sleeping in so the noise woke us up and they took multiple trips up and down over a 30-40min period and eventually some of the kids woke as well so it was a rough first night! But that's life in an apartment building, I guess. Earplugs may be a good idea!