Because I stayed 6 weeks, I feel I should give a more thorough review! Hélène is very kind (she was patient with my poor French, and is fluent in English) and I believe she wants to please her guests. I was able to book with her last-minute. The apartment is well-located – the Plateau is indeed a great area to visit Montreal from (I even walked to Centre Ville all the time – 30-40 minutes) – which makes it a good value. The room is not much bigger than its furniture, but was clean, and the bed is big and comfortable. (The photos are accurate for the whole apartment.) The apartment does have a few quirks; e.g., the kitchen is a bit spare (in terms of cooking, just the stove and a small drip coffeemaker now – the kettle disappeared at some point!).
Overall, I would have been very pleased, except that I was disappointed by the noise issues/ occasional disruption I had with the flatmates. I am noise-sensitive, but noise does carry very easily throughout the apartment (even, say, calls from the far bedroom), and the bedrooms are in a row (it's 'railroad-style'); further, one of the rooms is rented more frequently, I gather (sometimes every few days, and the rooms seem generally full, even in the winter), which can mean quite a bit of turnover activity. It seems likely you will have 2-3 flatmates at a time in the 3BR/ 1BA, which can feel like a lot if they almost never leave the apartment, which was literally the case when I was there (whereas eventually I would try to mainly just sleep there). There was even noise from the street on occasion (a couple parties, passersby late nights) –this surprised me, because it is not a main street – that I would have to hazard would be more significant during open-window weather.
If you are young, not noise-sensitive, or are staying briefly, I doubt any of this will be a problem! I would feel remiss for not mentioning it, though, for those thinking of longer-term stays, since I felt ill-prepared for it. I should also note that Hélène really stepped up eventually and dealt with a flatmate whom I found to be behaving a bit egregiously, so she deserves credit for that! In most respects, I found her conscientious. If you get the right flatmates, it could be a good situation for all (just hard to know). Any Airbnb is a matter of fit, and this one just may not have fit me well.