My wife and I used to like this place and hadn't been back in a while so we decided to take my parents. I got worried by all the negative reviews on this site, but we had an excellent meal (with alcohol -- if they lost their liquor license, it's back). No offense, but the strong negative reviews of this place miss the point -- if you want General Tso's chicken and egg rolls, go to Empire Szechuan or some other brown-sauce emporium. Evergreen still makes terrific Shanghaiese food -- at least as good as the uptown Joe's Shanghai, if not as good as Flushing or Chinatown's best (and as others have noted, the ambience is nicer). Try an assortment of the small appetizer plates (especially the preserved duck with anisette), one of the casseroles, or the excellent sauteed pea tendrils with mushrooms.
FWIW, my wife knows people in China who know of Evergreen as a place to eat when in NY. It may not cater completely to American tastes, but it is solid Shanghaiese food in an elegant setting.