I ate at the one in DTD about 9 months ago. It was very expensive and not very good. The pizza that our daughter ordered was worse than the ones you could get frozen from the grocery store. All things considered I would say its not worth the bother, too many other places to eat that are much better.
I'd stick with the Express part if you feel you *have* to eat at a Wolfgang Puck's. Like I mentioned before, the BBQ chicken salad is really good. At the Express area, you order and pay at a counter, get your drink and a number for your table and then they bring the food to your table when its ready.