I took my partner here for a birthday ending in zero, and we ordered the roast duck prix fixe dinner. Lai Wah Heen is known for its dim sum, but let me tell you: come by for dinner. There are fewer people, the atmosphere is quiet and elegant, and the service is very personal and attentive. Besides, the duck is amazing. It's probably the best roast duck you can get downtown, and it's presented authentically with the filets cut table-side after the roasting. The skin was perfectly crispy and the sauces piquant enough to cut through the richness of the meat. And despite the fattiness of the duck, it tastes very light, and you won't feel that sinking feeling afterward. One duck is more than enough for two people, and you could probably feed three or four with extra soups and side dishes.
I also very much enjoyed the tea service, and wish I'd tried more of their teas. That may actually be the secret to digesting all that rich food -- the tea! So do yourself a favour and order a pot.