Awful. JUST. EFFING. AWFUL!!! If you enjoy an airport that has hordes of people standing in the terminal hallways due to a limited seating area in the lobbies adjacent to the gates, then Charlotte has a good one for you. If you enjoy an airport that will turn off the people walkers during rush hour, then this airport is for you. If you love the A/C being turned down drastically while there is 10,000 people running & sweating their butts off with you, come to Charlotte.
Just imagine Atlanta's Hartsfield-Jackson airport on a smaller scale, and you have Charlotte. While the amenities are reasonable, you may not have time to enjoy them if you are connecting with a flight that is 2-3 concourses away. There wasn't any noticeable in-airport train services, so you'll have to hoof it through the crowds.
The only pleasant thing that I saw was that you have a very good view of downtown Charlotte, which is simply a jewel of the south. But that's about it.
Beautiful city, yet this airport sucks!