While I cannot fault the location of this Airbnb, with close proximity to plenty of restaurants, shops and the metro stations, we did however have issues with the cleanliness.
We arrived to find the bed unmade with the sheets left in the dryer, stained towels and the bathroom & kitchen unclean. We then reported this to the host, and even sent pictures, but we were just told that the cleaners had been in as usual and they had never had any issues prior.
We ended up washing the bedding and cleaning the apartment ourselves, and after very little responsiveness from the host, were offered a mere 50% of the cleaning fee back as compensation - which equated to less then 6% of our total booking cost.
Based on the lack of cleanliness and the brief (and somewhat rude) responses of the host, I would not recommend staying here when visiting Montreal.