This is my favorite type of restaurant: nondescript neighborhood, ordinary looks*, unbelievable food.
Many people claim this is the best pho in Toronto - I'd have to go to a couple more pho places to issue a final verdict, but to be honest... I don't want to eat pho anywhere else now, this place is SO GOOD.
A note of warning, though: don't expect good service. In fact, expect a Seinfeld's "soup nazi"-like atmosphere. But don't be turned down by this fact, the food is worth it.
* - notice their logo is "borrowed" from the Laughing Cow brand :)