We've done several.
The ones we would return to:
Crystal Palace -- breakfast only (a must do every trip)
Boma -- did it for the first time last month and fell in love with it
Biergarten -- lunch or dinner -- always a great meal
Cape May Cafe -- breakfast or dinner -- we really loved breakfast; dinner was great and then so-so
The ones we might return to:
Chef Mickey's -- breakfast only (dinner was very disappointing the last time)
The ones we definitely will never return to:
Hollywood & Vine -- one word: YUK
Whispering Canyon Cafe -- although not really a buffet, we did make the mistake of ordering the skillet and it was almost as bad as H&V -- never again