Best dim sum in Richmond hill but be prepared to wait in line on both weekdays and weekends. Their har gao is one of my favourites and the vegetable dumplings are fantastic as well.
Funny thing to note here is that if you ask for cold water, the servers will look at you like you're crazy and then eventually bring out bottled water. Bottled water is free and I've had this several times. Don't forget though - the tea costs you!