We enjoyed our stay in Montreal and found the apartment to be a decent base for getting around.
There was nothing majorly wrong with the apartment, but there were a few annoying things. For example, the bathroom door does not lock, the handle on the shower door is missing (although it's in the photos so was there at some point), there is no toilet roll holder (also mentioned by a previous reviewer), there is only one coffee cup (and then a few small glass tea cups), etc.
Also, while the AirBnB page indicates that the host speaks English and French, a number of my messages to him (sent in English) received replies from him in French. There were also times he was slow to respond, and a question I asked about parking just after we checked in never received a response.
Overall though the apartment met our needs.