The actual airport is quite large and does a good job accommodating all of the traffic it receives. There are 5 security checkpoints so the wait is never too long. They all lead into the center or heart of the airport which is essentially a food court. Each terminal is then a branch off that and has more food and shops.
There is a ton of construction going on, mostly with parking and the roads leading into the airport. It seems like for the past year or so, every time I go to the airport they are re-routing you a different way. It will be nice when it's all said and done.
My biggest gripe about the CLT airport is that it is a US Airways hub so you would think you would be able to get great deals on flights out of here that may even be a direct to your destination, right? WRONG!!!! Flights out of Charlotte to many places are ridiculously overpriced. It is sometimes cheaper to drive 2 hours to a smaller airport which would then route you to, guess where? Right back to Charlotte! It's more expensive to get on the flight out of Charlotte directly.