The layour is 3 separate terminals which are each a semicircle ring: http://www.metafares.com/images/airports/MCI_Airport%20Layou...
It is great to fly in and out of. It feel optimized for people to get on and off planes quickly, and get out of the airport fast.
It is awful to have layovers in or have to change terminals in for a flight: you have to leave security for everything for one. And the waiting spaces are cramped and unfriendly.
After 9/11 it's still extremely fast to get in and out of, but the long waiting before flights is unpleasant. - Personally I would love to see airport design focus on passengers and less on retail space. All the proposals to replace KC Airport brag about all the shopping and restaurants... when all most people care about is spending as little time there as possible.