If you like buffet, this is the place to go. This is the flagship restaurant of the Mandarin Restaurant chain and it is certainly one of the largest there is. It is a great place for groups because there will be something for everyone there. It's much more than just chinese-style food, there is a meat carving station with prime rib and Yorkshire pudding, pizza, sushi (note that all of their sushi is cooked, although it is very good). Plenty of staff around to serve you and make sure that the dishes put out are kept fresh.
One recommendation if you are bringing a large group: put your reservations in well in advance, particularly during the holiday season as they tend to book up quickly