It's actually called Emerald. I'm there frequently. Pretty good quality.

As for Vancouver, I'll have to second another poster who said Sun Sui Wah. I've been to the Richmond location and it was very good (granted, it was a few years back).

There are tons of great dim sum places in the Vancouver and Toronto areas, many of which no longer use carts. In the Toronto area, go north of the city (Markham, Richmond Hill) for the best quality. I'm very wary of any place downtown, any place that offers dim sum past 3pm, and any place without at least 70% Chinese customers.

I've also been to several in HK, but can't remember the names of any.