I don't usually go for dim sum but I know that at most places, there are lots of employees pulling trollies with food inside and you would have no issue getting food because there are so many of them walking by.
Here (at least when I went), there were literally one and sometimes two employees going around with food. The tables in here were all filled with people so everyone was just waiting for those two employees to pass by their table to order. I don't know if they just didn't cook enough food or if they were understaffed, but having only two workers at a time in a busy place like this isn't going to work.
After a while, people were getting up from their tables and walking across the restaurant with their order sheets straight to the employees pulling the trollies just to get some food. That was the first time I've been to a dim sum place where the diners are going up to ask the employees for food instead of the employees going around offering diners the food in their cart.
So, we had to wait quite a while in between each dish because we had to wait for the one to two employees to make their way around to all the tables... and the food is mediocre at best. Not a good experience and I wouldn't go back.