4 terminals, clearly labeled road signs, easy enough to navigate. You're better off following the signs than listening to any GPS (which made me go around in a huge circle). Employees are friendly and competent.
I'm partial to Terminal 4 (Home to AA and Southwest) which is bigger, newer, and all around better. Plenty of food options here too. Luggage always arrives promptly after every landing, which I really appreciate.
Terminal 3 (Home to Delta) looks like it could've used an upgrade years ago. Arrived here at 4:50 am for a 6:30 flight and barely made it in time. Line for baggage drop off was nearly out the door and there was one person working the regular drop off counter. Meanwhile Delta Preferred dropoff had 3 working counters for a much shorter line. Just ridiculous. Not sure if it was an airport or Delta issue, but an hour long wait just for baggage dropoff was way unnecessary. Hope they got their act together after that fiasco.