Alamo @ Frankfurt airport

Like: Got a free upgrade, which is always nice. But had to wait a long time behind just 1 other customer to get service. Car was in excellent condition. Had a great trip in Germany with the car. The price was a steal, even for the basic SUV I had originally requested.
Dislike: No answer at all when calling their office to extend! They absolutely don't pick up the phone. In the end, I had to go to the airport again on the day I was supposed to return the car, to extend my reservation. During drop off, no receipt/information about billing was given.