Note: was here recently (August 2014) outside of the popular lunchtime dim sum (before 11am... they open at 7am!) and they give you a menu with photos and English on it to order off of - perfect!
One of the better Chinese restaurants in the city, imo. Very authentic. Unfortunately, the last time we were there, the service was incredibly slow (to start). But the food was great. We had a really delicious clay=pot lamb stew that came with bok choy, bamboo shoots (which I love!), and large shiitake mushrooms. We also tried a snake soup - I've never had that before - which had a nice spicy ginger flavour, and the snake tastes and looks like chicken breast, so don't be put off by that!
I've been here for dim sum on the weekends as well and I really like it. Lots of choices and traditional dishes.
Best to make a reservation as it gets quite busy.