I've had mixed feelings about Katherine's apartments, where I've stayed for a whole month… At the beginning quite disappointed in the apartment itself (not what it looked like and felt like on the pictures) but after a few days, it was ok - once you light up a few candles and hide the unlovely rug under the bed! Inconvenient shower (spurting water, no shower hose, you can't take a shower without wetting your hair, girls get a shower cap!) but that's not the end of the world - sometimes poor internet connection but of course the connection always ended up coming back at some point, thin walls but quiet neighbors (I was on the last floor though), lots of storage, and very clean bathroom and apartment, located in a quiet beautiful street near the WONDERFUL Mont-Royal Avenue with shops, restaurants, coffee shops… the best neighborhood in Montreal in my opinion. I had no car and had no problem getting wherever I wanted as the apartment was not really far away from the city center (and anyway, a 10-15 minute walk from the Mont-Royal subway station).
There is just one washing machine in the building but I went to the launderette just 200 yards away where you can clean your clothes very quickly for about 4,50$ (washing+detergent+drying).
Even if I didn't get to meet Katherine she was available by e-mail (I needed a desk chair and she got me one, and has been very willing to help for the internet - even if the solution still has to be found) and the "janitors" Juno et Victor were also available on site (please, give your guests at least one recycling transparent bag with directions so that everybody can do their part, that would be great!)
To sum up : a cheap-looking clean accommodation with sometimes unreliable internet connection wonderfully located. Not perfect but I've had a beautiful month in Montreal.