I live around the corner from here, and it is the default option when I don't feel like cooking. It's just SO good.
I am vegetarian and absolutely love the Portabello burger - and I typically hate mushrooms. The combination of Portabello mushrooms, brie cheese, and grape tomatoes in a balsamic glaze is fantastic. That said, I tried the Veg burger and wasn't a big fan. It's a bit crumbly. It wasn't bad, just doesn't compare to the Portabello burger.
Any meat-eater I know loves the place too. Poutine is good too. They even have amazing ice cream.
It's not a cheap burger joint, but I think you pay for quality. Two burgers, fries, and drinks typically come to $19-22.