This is most likely the best oyster house you'll find in Toronto, it probably has the best selection and the freshest quality.
Don't get fooled by the relaxed environment because you will end up spending big bucks here. The server is not going to take your jacket or fold your napkin, so the service is not your typical four yelp dollar sign. Food wise, it definitely lives up to the hype.
Besides their oysters, I also recommend their in house ceaser (you can adjust how spicy you want it), and the scallop pasta!