It's great to have a decent burger joint around Markham. Five Guys have their characteristic diner decor with the usual food court table and chairs which are kept pretty clean for how messy the burger can get - because they stuff a lot of toppings in the burger and you're bound to make a mess while eating!
I've long found they give you much bigger portions than you'd expect. I always order the small fries because as it turns out they just fill the paper bag with fries anyway regardless of what size it is. The difference between a junior and a regular burger is 1 vs 2 patties, and I'm more than full with a junior burger.
Fountain drinks are self served and refillable, which is always great. And of course free peanuts!