As far as I can tell, almost everyone who has posted about it really liked it. It's very nice to have a table to sit at while you watch the show and various treats and beverages brought to you by the CMs. If you've not done it before I'd definitely recommend it.
I went last year with my sister. It was our first time doing the WOC party and we enjoyed it very much. However, I probably won't do it again as I didn't feel the food/beverage part would make the price worthwhile. I think most people like it, but there was almost nothing aside from grapes and cheese that appealed to me (lots of food coloring, sugar, and low-quality treats IMO). Now, it may be that they change the offerings from one time to another. Anyway, it was fun and I'm glad we did it!