Delicious and cheap. What more can you possibly want?
I went to Square Boy tonight on one of my many repeat visits since I was first taken there by a friend in September '08. As always, it was yummy, affordable, and I walked away crazy full.
As others have mentioned, the burger combo (a large, fresh-cooked patty with your choice of toppings, a carton full of fries, and a can of pop) costs a mere $4.25 + tax (add a little bit more if you want cheese on it). This is not only cheaper than a chain fast-food joint, but it's also WAY more delicious! I should also note that they have a wide variety of pop can options, and I usually indulge in an old-school fave such as Grape Crush.
I've also tried the souvlaki there which is pretty standard amongst the other fast-foodish places along the Danforth. Not the best I've ever had in the area, but very good for the price.
Oh, and you've gotta love the staff. Those old Greek men and their sarcasm and bluntness always makes me laugh!