I do really like the Main Street Burger Shoppe - it's a sweet spot in Stouffville that offers quality burgers that isn't your local Harvey's or McD's. Their burgers, both veg, and meat, are delicious.
The portion sizes are humungous so definitely just order one order of fries to share with someone if you're going to order burgers AND fries. Price point wise, they are definitely pricy. My bill came close to $20 for a burger and fries meal.
Would definitely return...just share those fries :P