This new outpost of the St. Lawrence Market fave is a great option in Yorkville, which doesn't have a lot of restaurants with great value. Buster's Sea Cove has a great variety of options from classic fish and chips to grilled fish plates, salads, fish tacos, and sandwiches. Most things range from $10-15.
I had the grilled tilapia sandwich ($9) which tasted fresh, flavourful, and the portion was very generous. They don't skimp on the fish! I got the side salad (+$4), which was a pretty unexciting garden salad with balsamic vinaigrette. My DC had the fried calamari po boy with fries. Super yummy and I really liked the fries too!
Fast, fresh, and friendly -- this is a good spot for a quick bite if you're in the area.