We've eaten there 3 times, the most recent one in July 06.
Our first 2 visits to WCC were in 2003 when we stayed at WL. We liked it then well enough. Our return in 2006 was not nearly as good. The food was definitely not as good as what we'd had before, our server was sweet though slow, and the antics were not that fun. We do have senses of humor in my family, and we were actually looking forward to the silliness we remembered from before. But this visit was not worth it at all.
As someone else mentioned, it's VERY loud in there, so the point that one of my kids said he wanted to leave before dessert, because he was tired of the noise. I know some people like that, but I learned my DS did not.
Anyway, while planning this trip, I asked the kids and DH for where we should return to and NO ONE mentioned WCC. We're going back to several places from before, but not WCC.
I think if you're staying at WL or really want to tour the resort, then eating at WCC is a fine idea. But I would not make a special trip there for it.