Hi all, just wanted to post a warning to anyone traveling in the Columbia, SC area. Do not rent from GSP Transportation (which runs Dollar and Thirfty out of the Columbia airport). I traveled here in July 2011 and rented a car from them for one day. I did not opt to take insurance, and long story short, they claimed I scratched their car (which I assuredly did not - I thoroughly inspected the car prior to dropping off). The customer service is TERRIBLE - from the moment I returned the car, where there was no attendant in the lot OR at the kiosk inside the airport, to the months of phone calls and emails to the customer service desk and claims department - my calls and emails were never returned. All I wanted was to discuss this matter with the company, and I could not even get the courtesy of a return phone call from anyone other than their collection agency, which had no knowledge of the alleged claim. Quite frankly, I am contemplating taking them to small claims court. In the meantime, though, unless you want to be the victim of potential insurance fraud at worst, or the worst customer service ever at best, I highly recommend avoiding this company. Please note I am not a hate-poster - feel free to check out all my other reviews (username ericafowler). I just want to warn potential travelers away from this company - ignore at your own peril!