There aren't many authentic Chinese places to choose from in Phoenix and its surrounding areas, but considering this place has both traditional and westernized dishes as well as great dim sum you may not need to go any where else.
I've been here several times; all for a Saturday dim sum with my large family (so we get to try a lot of dishes) and they churn out the food fresh and quick. The waitresses push the rolling carts of tempting delights stored in steaming bamboo trays stacked several high. The standard dim sum dishes are all very good and not too greasy (although some are). And my grandmother tells me the chicken feet are very tender and succulent (I'll trust my grandmothers' word).
If your exposure to Chinese food is only PF Chang or Panda Express, be daring and try some traditional Chinese dim sum one Saturday morning and learn what you might have been missing out. My relatives will be here this weekend to celebrate the Chinese New Year!