I've tried to rent here four times. First time, they swapped cars on me, so I cancelled and went to Avis. I had a particular car in mind for a reason. Second time, I got the car and everything was perfect. Third time, the system didn't send me a confirmation email and the website left me in a "we're searching for your car" loop. Turned out the reservation had gone through, but I cancelled it and tried again. Fourth time, perfect. So, Sixt is batting .500. That being said, the service at the shop was excellent, the car was clean and the value was high. The ease of renting here is why I come back. Blake does a good job handling your rental.