Only average, did not really enjoy the experience to be honest. We arrived after the lunch rush at 2pm on a Saturday and the wait staff still seemed too busy to offer any courteous service you might expect for this area/clientele and price.
As for food: Har gaos were big, but big isn't necessarily good - not much flavour. Siu mais were also too big and tasted pork-y (in a bad way) with shrimp that wasn't deveined, which was a major turnoff. The shrimp & leek dumplings and BBQ pork sesame pastries were pretty good but I wish the food was hotter. The beef rice noodle rolls tasted good as well but the beef was really pink which was also a turnoff. Plates did not seem like they were dried or cleaned after food was plated. The decor is very nice but overall cleanliness is meh.
Bottom line: there are other better options for authentic, traditional, high quality dim sum.