Kath's Air BnB was super convenient for us. It is a block away from Notre Dame in the Old Port of Montreal, within a 5-8 minute walking distance from many great restaurants and pubs, as well as 2 different breweries. It is a 10 minute walk from Chinatown and about 5 minutes from the pier. There is underground parking nearby as well as plenty of coffee shops.
We enjoy staying in this appartment building when we travel to Montreal because it has everything you could need for a short term stay. Kath's place has plenty of bedding, towels, and toilet paper, as well as a Keurig, a toaster and kettle in the kitchen. There was nothing extra we found we needed in the 3 days we were here.
She communicated frequency with us and always kept us up to date and answered questions we had. She was very clear with check-in and check-out procedures, which was appreciated. When we come back to Montreal we would love to stay here again.