I have visited Montreal many times to see my grandmother. After staying at Carols Purrfect bnb, I stopped going anywhere else. The house is like a museum, full of artifacts from all around the world. Each piece has a story from one of Carols adventures around the globe. She's traveled to more than 65 countries (I asked) and she'll tell you the most amazing stories. I've stayed in each of her rooms, including the basement suite (You should see the stone wall). It's worth mentioning that the house is a short walk away from a metro, so you can park your car and never touch it for the whole trip.
If you're lucky, you'll catch the cat and dog playing with each other.