Our family really loved this apartment! The location is perfect, it's beautifully decorated, and has plenty of space to spread out. The host was responsive during our entire stay and we had no issues with the keypad. The Plateau neighborhood, and Rue Saint-Denis, made us fall in love with Montreal.
Our only complaint was the back bedroom. The weather was very hot during our visit (in August) and we had a hard time getting the bedroom cool enough for comfortable sleep. There is a door in the back bedroom that leads to an interior staircase connected to the upstairs units and the restaurant kitchen below. The door locks from the outside so it can't be opened, but we would have preferred a more secure lock, as there were definitely people in that stairwell throughout the night. The noise from the restaurant kitchen was very loud from 8-10:30pm, so if you plan to settle into the back bedroom early for the night, bring ear plugs.