I visited this place multiple times when I was in Montreal. We were recommended to this place by a chef at Provisions. Apparently, at the end of the day they take their leftover and donate or give it to the less fortunate people.
My favorite at this place was their Kouign-amann. It tasted AMAZING (maybe cuz we went right when they opened, but I was very happy with it). We tried variety of stuff there, names that I can't remember cuz it was all in French lol.
They have tables there that you can sit down and eat at, but we just ordered it to go. Also, they do brunch on the weekends, which I may try next time i'm in Montreal.