We loved the Sushi at Wolfgang Puck's Cafe. It was the best sushi I have ever eaten, better than California Grill or Teppan Edo (and definitely better than Tokyo Dining). They have a sushi bar, and during weekdays, they offer half price sushi rolls during happy hour. It was so incredible that we returned three times on one short trip to Disney (when we had not planned to visit the sushi bar at all).
My brother-in-law said it was so good, that he would drive 600 miles just to eat dinner there and then turn around and drive 600 miles back home.