San Francisco's China Town is getting a reputation for being dirty. Its a shame considering the historical value the area has that it isn't getting better tenants. R&G Lounge is an exception to this. It is pricey, but the price is worth it. It was easily one of the best restaurants for traditional Cantonese Cuisine on the trip. It was very clean all around, and the food was spectacular.
I'll be writing up some recommendations on other Chinese restaurants in other parts of the city.