First and foremost it was awesome stay, host is really helpful and you should find everything you need for you stay including shopping bags!
Location is also excellent close to metro (both station and supermarket ;) ! ), in calm neighbourhood.
BUT I will do a little bit of nitpicking because it may be bigger issue for some!
1. Couch is cool, but not very comfortable to sleep :(
2. You can hear neighbours walking, so if you need total silence to sleep take ears cover.
3. Also if you need total darkness to sleep, take eye mask.
4. If you're clumsy, there isn't much of space in apartment, so being organised helps ! :)
Nonetheless when I will be back in Montreal I would choose this place again!