Black Duck is located in the Park South Hotel on 28th Street between Lex and Park S. (ok, supposedly it's located in the building next door, but since you have to go thru the hotel lobby to get there.....). I've eaten there twice in the last month and had two very nice meals there. It's not a large place, almost all small tables, probably about 70 seats in all? Nice but fairly simple decor; the one problem I could see is that since almost every seat is fairly close to the largish-for-the-size-of-the-place bar, somone smoking could spoil a lot of folk's meals (wasn't a problem either time I went, and hopefully will be a moot point at the end of this month anyway).
The menu isn't very extensive, but not totally limited either (about 1/2 dozen appetizers and slightly more main dishes?). Both times I had the Lobster salad as the appetizer, which I thought was excellent - a small pile of cold citrus-marinated lobster pieces, mesclun salad in a diferent citrus-y vinaigrette, a couple of small fried dumpling-ish things (not sure of the filing). Very nicely arranged on a square black plate. Very similar to what one would expect at a Nobu or the like.
First time there I had the "signature" Black Duck, which is a black pepper crusted duck breast. It came exactly as ordered (medium rare) and was very flavorful and juicy, and not overly peppery. The cherry glace/sauce wasn't overpowering, either. Second time there I had the rack of lamb, which was also prepared exactly as ordered, juicy and tasty, and not overpowered by the port wine sauce. My dining partner had the filet mignon both times, and though I didn't taste it, he said it was "good" both times.
Didn't try the deserts either time, so no info on that!
Service was good, neither overly "attentive", nor "lost in space".
Fist time there (Friday nite?) there was some live Brazillian (samba?) band.
Tab was +/- $100 for 2, including tax, tip and a beer each. Not cheap, but I thought it wasn't totally out of line; so I guess it's a "if you're in that neighborhood" thing. (boy, a couple of years ago I would have called that "really expensive" - I must be getting old)