CLT can be a challenge. It is the 10th busiest airport in the US. Passengers going through CLT has double in the last 20 years. They are currently going through a $4B overhaul. Hopefully that will help. It has to a degree so far. My biggest issue is parking. Availability and cost. As George said, getting around A, B, C and D is not bad. E is just a long walk. Security seems to be a breeze most times.