Garden Grill breakfast was one of the best character breakfasts we've ever had, right up there with Tusker House.
We had dinner there once, and disliked that as they poorly accomodated gluten-free at dinner, and made us share a booth with another family, but breakfast was great. And even at the bad dinner, the character interaction was very good, better than at most WDW restaurants.
Just be careful if you're a party of one or two, to stand your ground against having to share a booth with another family if you're not okay with that. I was caught off-guard when it happened to us (they basically said tough luck when I asked not to sit there), but I would flat out refuse to be seated in a shared booth if they ever tried that on us again.