just remember before you order that they changed the rules on them...
While they still give you a 20% discount on the meals... they now add on an 18% gratuity automatically... Frankly that defeats the purpose unless you think an 18% gratuity makes sense for things like buffets...
And if you get it... do yourself a favor and don't let the server know you have it until you are finished and ready to pay... I noticed that the quality of service drops when they know you're going to be tipping 18% no matter what... which makes sense.. why bother to provide service to someone that is tipping not matter what.