I had a terrible experience with Rentalcars. My car reservation was cancelled at the last minute when I arrived to pick it up, leaving me stranded. They offered only a refund or a much worse car at another location, which was not even comparable to what I originally booked. No other options were provided, and when I contacted customer service, they insisted that I accepted the new booking, which they used to justify cancelling my original reservation. This is completely unacceptable and unprofessional, as they had no right to cancel my initial booking in the first place.