I find this place a bit hard to find in the plaza, you gotta find the small door to get to the elevator/stairs; it's on the east side of the plaza.
As for space, it's pretty spacious and isn't very full. Many of the tables appear to be filled but it isn't bustling.
The food, pretty decent. They got some "special" items that are more expensive. Saw a pic by JenniferK of this abalone chicken flake; let me say the picture makes it look A LOT better than it really is. Expect a small litle thing in a bowl that is too big for the pastry. The pastry is more steamed bun as well. Not worth it in my opinion.
General standard fare is quite good like the shiu mai and har gow. The fried taro dumpling has chicken instead of pork and it taste very good. The curry cuttle fish is not really traditional cuttle fish but is like octopus legs is how I'd describe it.
In general this place is a little more expensive than your traditional place. It's not out of place for Richmond Hill.