First, the company refused to accept dual-currency credit cards. Second, I rented a diesel car and it didn't have a full tank of AdBlue when I picked it up, and the rental company didn't inform me about it. Third, the car broke down on the second day. Luckily, we found a kind person who helped us call the rental company for assistance, but Alamo refused to provide consultation or help and directed us to a Mercedes-Benz service center. I think these three points are enough for a one-star rating.