Not a hugh fan of Grand Central in NYC. Been there every so often for lunch, and it's been declining for the past couple of years. Often the oysters seemed not as cold as they should be. Hugh selection though. Clam chowder is good, but I found it a bit too creamy and heavy, overwhelming the seafood taste. Too many tourists too.
Pearl Oyster Bar is good, very limited selection when I was there. Lobster roll was a bit overrated. Lobster roll from Klee Brasserie in Chelsea is the best in town (their oyster is great too).
Shaffer City Oyster Bar & Grill is my pick in NYC.