I'm not a big fan of Din Tai Fung in Arcadia; I find them overpriced and a bit synthetic.
Any recommdantions? And don't talk to me about Dumpling Master on Garvey in Monterey Park. I want the boiled kind, not the pan-fried potsticker variety.
My vote goes to Dumpling House on Rosemead Blvd, Rosemead. All the dumplings are made from scratch, which may explain teh looong wait times.