Terrible customer service! I've been in a rental car everyday for over 5 years so I know how other companies operate and this is the worst of all of them. I guess that's what you get when you expect good customer service from a foreign company. I rented a vehicle in Phoenix and the moment I drove off the lot, a rock hit the windshield which I understand I'm obligated to pay for. After my insurance paid over $600 to have the windshield replaced Sixt sent me a personal bill for an additional $114 to pay for an "administration fee." I contacted Sixt and told them I felt this was ridiculous and I also sent three letters to various customer service departments within the company. They cashed my check and I have yet to hear anything back from anyone in that company. I have requested my company take them off of our travel agency options