With a great atmosphere and located on the busy Sainte-Catherine, this place is definitely worth trying. Their burgers are yummy and they have a decent vegetarian selection available. But, their basic poutine was lack-luster.
The vibe of the place is nice and they have a decent amount of outdoor seating considering their location and pricing. The staff was friendly enough, but our waiter was (understandably) a little pushy about his tip.
My favorite thing about this place is their beer selection. They had plenty of options to choose from. We visited during the Jazz Festival (sponsored heavily by Heineken) and as close as Frite Alors was from the Jazz Festival it was worth a short walk to drink something other than Heineken. Not to mention how reasonably priced their beer is.