Yes, this airport is huge. And yes, this airport is busy. But all things considered they accommodate pretty well. Not too many airports have employees offering rides to the gates on a golf cart and not too many are large enough that they have their own people-mover.
I've only had to transfer planes, so I've never made it outside the airport so I don't know about shuttles, car rentals, hotels in the area, etc. But I do recall that employees were helpful and it was easy to find my next gate.