Niu-Gu was a huge disappointment. The food was very expensive and fairly boring, service was also nearly inexistent.
Yelp Check-in (or not): they no longer honor the yelp check in offer, even though it is still live on the page.
Xia Long Baos: they steam up frozen baos. You can tell because the skin is soggy and the juice inside is almost flavorless. It's basically melted icicles that make up the "juice" inside. The vinegar comes pre portioned and was a fairly stingy portion size.
Napa Cabbage w/ egg yolk sauce: this was the saddest dish I've ever seen. It was literally just a plain white Napa cabbage and a salted egg cracked into it. No other garnish or anything.
Black Pepper Beef Tenderloin: this was half decent. The flavor was great, but the ratio of meat to vegetables was really off. I think it was over 70% vegetables. For an $18 dish, I expected the portion to be much better.
So to top off the damage, it was almost impossible for us to get a server to bring us a check. When we finally got our check, they forgot the pen. We gave up waiting and my wife went to their expo line hoping to find someone to take our money.
There are plenty of good Chinese eats in the area. If you're in the plaza already, turn around and go to China Mama!