The Great Shanghai, a restaurant we've been going to at least 1xmonth for the past 10 years NEVER (or at least seldom) seems to get mentioned on this board or in reviews/listings of Chinatown's best, etc.
I çan't figure out why - the real Shanghai items on the menu - the soup dumplings, the shredded pork with bean curd skin, fresh green soybeans, and pickled vegetable (habit-forming), the "fried fish fillet" with an incredibly crisp batter laced with a bit of seaweed, the pea shoots with baby shrimp, and so forth.... are all well worth an eat and are very reasonably priced to boot.
They also have great homemade scallion pancakes. Their American-style Chinese offerings - kung pao shrimp, and so forth - are also good, if that's your thing.
The service is very pleasant - the place is run with an iron hand (in a velvet glove) by Mrs. Mao, a former teacher from Shanghai, and the waiters are uniformly nice and helpful - the decor modern, with Miro and Klee prints on the walls, (even though you don't eat the decorations...).
A much more agreeable experience than some of the shoehorn-you-in popular Shanghai joints. You don't even have to insist on getting the real stuff (just ask for recommendations if you're not sure, the English menu descriptions can be a bit misleading). It more than satisfies the cravings developed by a couple of years in Taiwan, HK, and the PRC.