I too vote go! Yes, it's corny-- but the cast is very talented and the whole deal is just FUN. I live in metro Atlanta so we see lots of live theater -- so this wasn't exactly a new experience but it was our first day at Disney before hitting parks and it was a great warm-up. We went last month (1/04) and had a central table and got, shall we say, "noticed" a lot! One of the women sat in DH's lap (he loved that of course) and she said, "Hi handsome! You didn't tell me you were married!" Our DS's ages 4 and 6's eyes were huge as saucers!
Then later they gave DS-6 a part, he went onstage (DH and DS-4 were in the bathroom and missed the entire thing) but DS-6 got stage fright backstage when I suppose they were telling him about his part, and one of the servers had to bring him back to the table bless his heart. He got a certificate.
I know things like extra attention are hit or miss, and the things that happened to us made it more fun, but we'd have enjoyed it anyway. They do interact a lot with the audience as a whole and that makes it different and fun.
Food is fine-- if not memorable, pretty satisfying I thought.
Do it for the same reason we all do Disney-- because it's fun!