Most of their stuff is rather mediocre and you can find better elsewhere; for example, grilled burgers are far better, Chick-fil-a is the king of fast-food chicken (I never liked KFC as I was spoiled by them), and god knows how many places you could find fries like those (Wendy's, for one). However, their apple pies are an exception; they're different enough from proper pies to stand alone in their own category of deliciousness, and they trounce your typical fried apple pie that wants to be-but just isn't-a turnover.
Oh, and even though you can find better milkshakes elsewhere, I've had some good Mcflurries, though part of it is my autism specialist (story for another thread) bringing me them for my birthday at school.