We had a fabulous trip with our kids ages 9, 6, and 3. The apartment is gorgeous, in a very fun and walkable neighborhood, central to everything -- 2 minutes away from the Mont Royal Metro stop. We drove from the U.S. and parked on the street by the apartment for CAD $8 per 24 hours.
The kids loved having their own bedrooms -- something they do not have at home. We had two other families over for dinner on a couple of our nights, and there was plenty of room for everyone in the giant and well-stocked kitchen.
I can't wait to come back!