This was one of my better Airbnb stays in Montreal. Hosts were attentive and responsive. The building's fairly new, and the apartment's in great shape. Soundproofing was unbelievably effective - St-Laurent St can get raucous. There was even coffee for the coffeemaker, which is not as common as you'd think.
The only reason I'm not giving a five-star review is that furnishings are a bit bare-bones. It's a tough space to work in - better if you're a solo traveler or couple who's just here to sightsee. And a floor lamp in the living room would go a long way toward making the space more welcoming. Overall, though, enjoyed the stay.