Having been to Thailand, I can say this just about as close to Bangkok street food as you will get in Montreal, great pad thai, amazing curries.
Inexpensive, most dishes are under $10.
Just be warned that ordering "spicy" here means spicy, they don't North Americanize the food, which is what I love about this place.
Note: This review is for the Bankok in the Fabourg on the 3rd floor, not the one a block away on the street.