Only stayed for one night. Since it is a hostel they were not asking for proof of vaccination, as per Montreal's current rules. So, make sure you do your research first regarding that if this is a deal breaker.
Stay was fine, people coming in and out frequently which is normal of a hostel. Location is very central to a lot of great places to visit. The staff were friendly when asking about things to do nearby and gave great recommendations!
Breakfast was toast with jams and orange juice. Stay here if you are looking for a place to crash and are spending most of the day exploring.