Both the Garden Grill (sit down character dining) and the Sunshine Season Food Fair (counter service on the lower level) are open daily at the Land Pavillion.
Yes, the revolving restaurant is the Garden Grill. I've heard excellent things about it, although I've not eaten there myself. It's on the list for a future trip, though!
We love the Garden Grill! I like to ask for a table in the front. The food was excellent and plenty of it. Mickey took plenty of time with us. He even helped my daughter figure out a puzzle. Service was great, warm and friendly.