Animal Kingdom is a Disney theme park
Yes, I've been. I think it's great, and it seems to be the forgotten Disney park. It is smaller than the other Disney park, and the price is the same. It never seems as crowded as the other parks, but that may change now that Expedition Everest has opened. You have to keep in mind this is a park based on animals and nature, so if your kids are looking for roller coasters and thrill rides galore, this isn't the place for you. Busch Gardens Tampa would be a better choice for that, it has a nice blend of rides with some animals/nature sprinkled throughout. Be warned however, BG is hugh! A 25 minute walk from one side of the park to the other.
If your looking for Disney lite, Animal Kingdom is a good choice.