We love the food at Rose & Crown. Some of the best in WDW, IMO. The fruit and cheese plate and potato leek soup appetizers are two of our favorites, and people on these boards swear by the stewed mushrooms. For entrees, you can get anthing from fish and chips to steak and mashed potatoes to roasted vegetables in phyllo dough with saffron rice and mustard cream.
We also very much enjoy Coral Reef. Portions are a little smaller, the food is a little fancier and there's a wide variety of things to choose from, including several different kinds of fish, steak, prime rib and pasta. Plus, the view through the aquarium window can't be beat.
The Garden Grill was okay, but nothing special. If you have kids with you, they'll enjoy the characters, but the food is very simple fare, served family style, and choices are more limited than at a regular TS or a buffet. The restaurant does rotate, but if you're interested in the view make sure you're seated on the outside ring.
We visit both CR and R&C every trip; the Garden Grill we did once nearly 10 years ago and haven't really felt the need to go back.