I only order one thing from this restaurant and that's the peking duck. I've been to this place about 7 times and have ordered over a dozen peking ducks. I have had peking duck at pricier restaurants but this is my favourite (so far).
I have three expectations for a "good Peking Duck":
1) The skin has to be CRISPY with a good roasted colour
2) The meat has to be TENDER and JUICY and flavourful
3) Unlimited hoisin sauce (at no charge!)
I'm serious about #3. What's peking duck without hoisin sauce?! Anyways, I think out of the dozen or so times I ordered the peking duck, only twice was the skin slightly under the crispy side.
I almost always order the two-course duck since I'm not a big fan of soup (that comes with the three-course). They give enough wraps/pancakes/crepes for the first course and usually not enough lettuce wraps for the second course. Feel free to ask for more, though I can't remember if they charge you extra. One order of the two course duck is enough for three people, maybe four if you order another dish.
If you plan on going Friday/Saturday night during peak hours, it would be best if you made a reservation. The place can get pretty packed at night.