When you're spending your own $$, and you want a great Chinese meal within yodeling distance of Grand Central, this is the place. Although totally crowded at lunch, dinner is a quiet time, as most of that business for them is takeout/delivery. Result? A delightfully quiet, good meal for an extremely reasonable price. In particular, the Szechuan Dumplings with Sesame Sauce are the best I've ever had, the Fried Chicken and Spinach dumplings are great, and their Siu Mai and Har Gow are both wonderful and fresh. Actually, their whole Dim Sum menu is great, and only slightly more than you'd pay in Chinatown, with your northbound Metronorth conveyance just steps away.
While lacking the romance of The Rainbow Room, the location, quality of food, and low price more than compensate.
I've been going there for the past 10 years. Long Live The Oriental Noodle Shop!
Pros: Food, Service, Quiet