As PPs have noted, CG is all about the view and it's pretty spectacular. There are very few restaurants on Disney property that are worth the cost, IMHO. Perhaps consider Topolino's dinner - beautiful view, better food. Though I haven't been, many people recommend going slightly off property to Bull & Bear at the Waldorf Astoria in Bonnet Creek. If you would rather stay on property, you may even want to consider some of the Swan/Dolphin restaurants which tend to have better food quality, IMHO (Il Mulino, bluezoo) though you will not get the atmosphere/view. If you like Japanese food, Takumi Tei is amazing.
CG and Topolino's are always jockeying for first place in our family. We are from NYC so frankly the prices don't shock us...
Here's how we have been thinking recently about the 2:
I think *on average* CG has maybe better food (meaning you're less likely to get a dud dish) - but Topolino's has particular mains and starters that shine. The sole, for example, and anything with duck confit. And for a while they were the only place other than Le Cellier to have Albertan beef, which was definitely better than US beef. I am not sure if that is still the case, but worth asking.
On bread, I think I like Topolino's better.
Desserts - I love desserts as a category, but I'm sort of underwhelmed here, but CG edges out Topolino's in taste, but Topolino's desserts are prettier.
Service - CG is more consistent, but Topolino's when it's on (which is 85% of the time) is ON. We may have also had conversations at Topolino's where they've dissed the CG prix fixe, and I think their comments are valid.
The views - depends on what you want. the MK view is so classic. But the outside deck is really just, step outside, look around, go back in. But the Topolino's deck is peaceful and beautiful and even though we've eaten there a zillion times DH and I always take a picture there and want to hang out there.
Hmmm... after writing all this - I think Topolino's wins, but CG is classic. DH likes CG more, I think.