Pros: We got the car even though our flight was a bit delayed and I was afraid we'd be too late and get charged extra. Customer service treated us very well at the airport and although she was the only person behind the desk, we weren't in line waiting too long, which we appreciated after a long day.
Overall a very positive experience :)
Cons: The car didn't reverse very well, I had to give it a lot more gas, but that is probably a manufacturing issue.
Also, the rental car return in Atlanta Airport is really confusing. There aren't any clear signs about return, other than the general vicinity of the company you're renting from. We also got there at 6am, so maybe the issue was more that it was really early and there weren't enough employees available to direct the customer.