I'm still going to give this place a five star review because I have been recently to Los Angeles Dim Sum and Seattle dim sum ( harbor city ). My favorite has still been Great Wall! Their tripe soup is on point and our favorite that we have tried. The service is as great as it could be. Yes, you have to ask for water and chili sauce but that is most great dim sum cart places. You need to be assertive and not timid don't be afraid to ask questions etc. Go early on the weekends like an hour after they open... you get all of the fresh dim sum and beat the rush...
If there are things you want and they don't have out yet be patient or ask someone ( we tend to get the most result out of tommy an older gentlemen that is on top of expediting). Great dim sum!