Booked a car with Advantage via Orbit, since it was the cheapest option for our trip. It was outside of the airport in a central rental center, and a shuttle took us there without any problem. There was no one in line when we got there (also no one showed up while we were getting our car). Given that the other companies all had a line of some sort, I was a little nervous about Advantage.
However, everything worked out! We got the normal upsale for car upgrade, insurance, prepaid gas, blah blah, but all the while the representative was polite and not pushy. We ended up getting a super new car (didn't even have a license plate yet) that served us well the entire trip. Return was painless as well, in an out in just a few minutes. Will rent from them again!