i've only been to the noho one (just 2 days ago actually). they don't have dim sum there per se- just siu mai, char siu bao and a chicken and mushroom bao. the bao are pretty good. the siu mai is just ok but we still get it.
their chinese dishes i think are pretty decent, i.e. almost as good as sam woo (i like sam woo). last time i got the beef w/ oyster sauce (good), steamed fish fillet (pretty fresh), seafood hot and sour soup (not so good), yang chow fried rice (decent).