This Airbnb is in what is known as the worst building in downtown Toronto (all of my friends had the same "oh THAT building" reaction when saying I was staying there. It is known for common fire alarms going off. This didn't happen to us, but if you're worried about being woken up, maybe choose a different building.
The check-in process is done remotely and requires getting through to the company's help line which took 20mins of calling over and over until I got through to someone to unlock the door.
The FOB we were given to use the elevator was out of date so we were given a different code to use which only opened the door to the floor 3 levels higher than us which required us to walk down 3 flights of stairs each time we wanted to return to our unit.
There was a bunch of crumbs swept into one corner which our dog found.
Overall if you need a place to sleep it is a good location, but you do run the risk of hearing a fire alarm and waiting to get help through a helpline if something goes wrong.