We loved this place - it's huge, cool, spacious, chic and unique. The pictures don't do it justice - it felt incredibly roomy and posh. We would absolutely rent here again. It was by far the "coolest" place we've ever stayed. It's also huge - high ceilings, huge windows, even the bathroom is big enough to host a small cocktail party (not that we did).
The neighborhood is fantastic - easy walk to wonderful restaurants, the waterfront, Old Montreal but away from tourists. There's a cute grocery on the corner that has everything you need, short walk to the metro. Excellent location.
I would note that the stairs to get into the apartment are steep so maybe not a good fit if you're traveling with kids or people who have mobility issues. And the floor is significantly curved (it used to be a warehouse and presumably this was useful for the manufacture or something) which we found cool and interesting but is a bit of a "woah" when you first enter.