This airbnb is in a fabulous location. It's an easy walk and central to all the great things to see in Québec. It was a comfortable apartment and looked just like the pictures showed it.
As others have written, it's a lot of doors, locks and steps up and down to get to the apartment which actually isn't on the Grand Allée, but rather in small outbuilding on the back alley. The sounds from the barbecue place below come up through the apartment when it's open. The wifi only worked some of the time. Note that the free ZAP Québec wifi sometimes worked in the apartment. I would advise against staying here if you need reliable internet.
In spite of these challenges, I would stay there again.