Tried the lobster roll and crab cakes. The food was very good, however also very heavy. Both came with fries (or salad) and a small serving of coleslaw. Definitely come with your appetite!
Being inside St. Lawrence Market, there is minimal seating, however if the weather is nice there's seating right outside the stall. The line up is also always very long, but moves very quickly.
Definitely a must try during a day at the market.