Host was traveling, but we got keys through Lockbox arrangement. Never met the host during one week stay. We kept in touch through emails and texts. Met one of the property owners when we lost a key, and fortunately he happened to be on the porch next door when we could not get in!
Great location-we had originally planned on being in Old Montreal or the Old Port, which are full of tourists. This location is just south of Downtown, surrounded by Universities, so lots of international students, but few tourists. It also encouraged us to walk through areas like Westmount, St. Henri, and use cheap public transportation to visit other areas like the Plateau, Little Italy, Old Montreal and the Old Port.
Beautiful one bedroom apartment, high end furnishings, very comfortable. We did not use the coffee machines or kitchen as we grabbed coffee/croissants/fruits in the neighborhood, and we ate lunch and dinner out.
Location turned out to be great-Safe-Convenient to public transport-encouraged walking in the adjacent neighborhoods. We stayed home one rainy evening and read/surfed the net. The bedroom is comfortable and quiet-unlike some of the other places we considered.
We walked 50 miles during our week's stay. Used the Underground for speed, but the excellent bus system allowed us to see more of Montreal.

Three minor negatives:
Internet reception is good in the front of the apartment, but doesn't reach the bedroom or toilet.
The front door lock is difficult to use: one of us did not have the physical strength to open the lock which gets hung up. Even from inside the lock sticks, so it is not key related.
The pictures on the site, especially the yellow door, led us to believe that the unit was actually on the main floor, rather than the basement. Once we figured it out, everything was as pictured.