This place is chinese equivalent to your hometown greasy diner that serves all day breakfast and doesn't care if you waltz in wearing a tank top, pajama pants and slippers because you're hung over and you just don't give a rats ass what you look like but are in serious need of greasy (sometimes overly greasy) dim sum.
It's not the greatest dim sum on the planet, far from, but everything you get is solid, and tastes the way it should.
As another yelper mentioned, everyone knows this place because if it's incredibly large and tacky "ALL DAY DIM SUM" sign out front. You can't miss it.