After having a confirmed booking, Sein contacted us (less than 24 hours before we were meant to arrive) saying they couldn't host us and asking us to cancel (which would have cost us the entire night's stay.) After threatening to report to Airbnb, Sein canceled the reservation and we received our refund. We ended up scrambling to find another acomodation the morning that we were scheduled to arrive in Toronto.
If you're looking for a stress-free Airbnb experience, keep looking!