Pleasant experience, employees were super nice and efficient. Had a variety of cars when I was there, return process was fine and pretty quick.
Only negative was that not all of the return lanes are covered, so if it is raining, you might get a little wet getting out of your car and getting your luggage. Overall though, a good experience.
Car rental center was pretty big, clean, and new looking, with free bus service that ran pretty quickly to the airport.