This place is lovely, but unfortunately the A/C in the apartment was broken while we were there and for some reason the building collected and retained the heat all day and did not cool down at night despite the fans they provided. It was not particularly hot in Montreal so we stayed out as long as we could, however we never enjoyed the apartment.
The patio is a nice touch but it is a shared patio. The upstairs guys were fine, not too loud or visible, but they smoked a lot of pot on the stairs of the patio during their stay. We had kids with us so we didn't use the patio while were there.
Our hosts were quick to get back to us and offered us another place on the 2nd day. We declined because one of us has access issues due to a physical ailment. The other place would have been a bigger problem than suffering from the heat. Our hosts offered a small refund which we accepted.