I visited Hakkasan a week or so ago. The staff were very helpful and friendly. The service and advice at the bar (re cocktails and new drinks) were also very helpful. I didn't try the food but it looked very good and a few people I spoke to confirmed the same.
The Atmosphere and whole decor was great too.
Only down side - on first visit it is a real **** to find.
The only Chinese restaurant to be awarded a Michelin star, Hakkasan is the brainchild of Wagamama-owner Alan Yau. Catering for lunch and evening meals, Hakkasan serve an extensive variety of eloquently prepared gastronomic Chinese delights such as lobster tail served with sliced orchids and strawberries or scallop shu mai with tobiko. The restaurant itself is decorated with authentic Chinese armouries which all add to that authentic Oriental feel. They now boast their own bar called Ling Ling which offers cocktails and their legendary dim sum.