hopefuly my 2 cents will save you lots of cents...here goes:
I live near Kansas City, which has the only other T-Rex restaurant in the world. It has been open for about 1-2 yrs, not exactly sure. Of course all restaurants have their growing pains as they sort things out, but here we are years later and its still not worth the time or money (IMO).
Of course Disney is a whole other world, a kingdom to be exact, but I can't imagine the food being much different. (Yo Quiero...Taco Bell is still Taco Bell no matter where you are)
The theme is cool and the decor is great, but the food and price leaves room for improvement.
PS - if you have eaten at Rain forest its the same thing, just different theme. I recommend stopping in for some cool pictures, but high tail it someplace else for food.