Great car, unauthorized charges ruined experience

The overall service was good, explanations were clear.

The store was easy to find, just across the street from the terminal. Though there was a peak rental period and I had to wait in line for a while, the paperwork was processed quickly. They didn't aggressively sell insurance, and once they copied my documents and handed me the keys, I was good to go! Exiting the parking lot was smooth.

Like: Had originally rented a cabriolet, but weather had deteriorated. Staff was brilliant in getting me a replacement vehicle that surpassed my expectations (BMW 530i).
Dislike: Were kept waiting for a while because staff was discussing an issue with a previous rental among themselves.

Like: The staff at pick up is friendly but staff at drop off is not friendly.
Dislike: I was told that cash is accepted at drop off counter, but then when I wanted to make cash payment over drop off counter, the staff told me only credit card is accepted.