Went to Vegas for a night with a few people. Stayed at the MGM Grand and wanted to try Hakkasan because I'd heard they had good vegetarian options and it was in house.
The atmosphere is great - it's a bit dark, but this is Vegas. I had the Weapon of Choice (some cocktail I picked out of the menu without really looking) and it was pretty strong. The food is served family style, so our table ended up with vegetarian dumplings, fried rice, the vegetarian dim sum sampler, mapo tofu, and some mixed vegetables.
The dumplings/potstickers were the best thing I ate at that meal. The mapo tofu was really not that good, but maybe it's because my parents are from Sichuan and I have some higher expectations. The mixed veggie dishes are not very inspired and kind of bland. The dim sum was pretty tasty. So I'd sayoverall, the appetizers were much better than the main meal.
The service was excellent, but twice the server came back to tell our table that they were out of a certain alcohol.
The receipt from Hakkasan got my group into the nightclub later in the evening in some sort of express lane, which was fantastic.