I have never had Dim Sum and have no clue about which restaurant is the best one to try. I would like to go to Chinatown and have a yummy experience. Also is Dim Sum served only on Sunday?
I like Ocean Harbor on Race St. It has a real Hong Kong feel to it. I have no idea if dim sum is served on weekdays, but it is most certainly served on Saturday and Sunday. Try to get there before 1pm. Also, try to round up a bunch of friends so you can order a couple of everything. It's the best way to delve into it.