Visiting from the Bay Area and friends invited us for dim sum to Mission 261. I read a not so complimentary review here. Our experience was quite different The service was excellent. We had some dim sum not available in the Bay Area. Some others (such as egg rolls and fried taro root) were beautifully crafted. For example, the fried taro roots were formed into little chicks. A friend said this speaks to the availability of cheap immigrant labor. Be that as it may, We also had excellent service. Some did complain that some of the dishes were not hot, despite ordering from a check list and supposedly cooked to order. This is a new restaurant and some operational problems are to be expected.
The bill came to $17 (including tax and tips) per person, for 2 large tables of about 24 people, who ate a lot. It's definitely not cheap.
On monday we went down market to Pennisula (Baldwin Ave., Arcadia) for early morning dim sum. They have carts, and the food is hot. Lots of variety, just your basic very good dim sum. The bill came to a little over $6.00 per person.
So if you want a more beautiful room and beautiful dim sum for twice as much, Mission 261 is your place. Otherwise Pennisula in Arcadia.