I was visiting Toronto last month and stopped in here and some lovely dumplings. I found this place listed in the lonely planet guide and they were right on the money.
There were two woman making dumplings in the front window. Always a good sign in my book. The staff was friendly and we quickly ordered a few different dumplings. The fried ones came with an amazing lattice of crispy goodness connecting the savory little guys. So yummy, such great textures. The ratio of veggies to pork in the dumplings was spot on. The spinach dumplings, while interesting, were not my favorite.
The place is dirt cheap and I would probably go there every week if I lived in Toronto. A great treat, give it a try!