I'm struggling to review this place because it has such nostalgic history in my heart, but it isn't, objectively, that spectacular. Johnny Burgers is a Toronto rite of passage. You can't be from Toronto and not 'love' Johnny Burgers. It's where you stop in after a late night. You can suggest it to your friends at 2am and they'll immediately respond with "OOOOOO! Yes bro!" The truth is that there's nothing fancy here. It's a straight burger. It's not the best and it's not the worst. The service is rough, but relatively fast. There aren't a ton of options and no one at this restaurant is going out of their way to accommodate you. Everything is a touch overpriced.
It is what it is. Eat it. Shut up. Don't over think it.