I went here on a weekday night and it was pretty empty. The burgers are big and tasty. I certainly prefer eating here over something like Five Guys. However I wouldn't call this place a "gourmet" burger joint (even though they are priced like they are!).
The fries are the typical style you find around Montreal. I can't really say I'm a fan. They're kinda soggy and not that great.
If you sit on the patio, the neighboring restaurant is very busy, noisy, and smoky, so be prepared. This is Crescent street after all.