My family changes dim sum places quite often because the quality of these restaurants fluctuate a lot. I'm not saying that this place hasn't changed, but it's currently the only one that my family would still consider. There are long line ups at this place, especially around peak hours closer to noon. If you order your dim sum before 11, you can have a discount.
As for all dim sum places, you'd be better off making a connection with someone (like a manager) to get a discount or free tea.
I have to mention that the atmosphere is really nice. It is a banquet hall, so there are probably fancy events going on in the evening. However, during the day, it makes for a very interesting dim sum experience unlike some other places.