I would definitely skip Tokyo Dining. Both the sushi and tempura were not good, just this last December 2008.
Brown Derby was great in 2003. In fact, it was stellar. But when my sister and I went in December 2008, both of our entrees were not that good. My Ahi Tuna was way overcooked, and I actually mentioned to the server that I love the tuna rare. It came out well done, no where close to seared.
And my sister ordered the Noodle Bowl with Wok Fried Coconut Tofu at Brown Derby. The only thing in the bowl that tasted good was the tofu. Everything else tasted like a freezer meal where you might open a bag, pour it in a wok, and serve it for dinner. It was disappointing.
We had great meals at Coral Reef, Wolfgang Puck's Cafe, Jikos, and Citricos (in that order). I loved Ohanas, Boma, and 1900 Park Fare for breakfast (again in that order).
Hope this helps!