I've made stops here twice - both on connecting flights to another airport. Charlotte is a US Airways hub, so the airport is rather large.
Compared to other large airports, this seems a bit more sprawling than what I've experienced; however, it will never compare to that hellhole that is ATL.
Charlotte seems to be a Southern city overridden with Yankees. The airport is the same way, really. You have Southern hospitality as well as Northern convenience and efficiency.
Overall, this is not a horrible airport, but it doesn't rank as one of my favorites. They could lay out their airport a little bit better.