Due to a plumbing issue in the original building we booked, the host provided an alternative condo on the same street, also top floor and that was very similar in look and feel (no rooftop access though!) to our original booking.And they were even able to still accomodate our early check in request.
As a result of the last minute change they were some minor issues in the condo - air conditioning not working but improvised with portable a/c which worked fine and some basics like dishwashing soap and condiments missing which was not a big issue and the host resolved this very quickly.
Host communicated well and was responsive.
Location is excellent, perfect for visiting Old Montreal. Steps away from Notre Dame Basilica, science centre, Old Port, lots of restaurants and cafes nearby. We used the underground parking recommended in the listing and it was great, not too far away.
I would definitely recommend this and would stay again when in Montreal .