Don't miss the crispy duck. The atmosphere is pleasant and comfortable which is not always the case in crowded Thai restaurants. Yank Sing has dim sum also at much higher prices at Embarcadero Center. More for the tourist crowd and a little more user friendly than the Golden Dragon. Food is served promptly on traditional Dim Sum carts.
Spring rolls are particularly excellent, as are steamed shrimp pastries.
Don't miss the sticky-sweet sesame balls. Chinatown location means crummy parking. Angkor Wat has some of SF's best Cambodian food. Cambodian food is similar to Thai but a little fruitier. It's an interesting place to try out in SF's Richmond District.