This was my first international car rental, and I lacked experience. At the store, the staff said the model I booked wasn't available. They should have upgraded us for free to a larger model, but the staff insisted we pay more. They didn't explain properly that the extra payment was in addition to the original rental fee. After communicating with the rental company, we paid for one day of the upgrade and then swapped the car at the airport the next day. Overall, Dollar is a small company with tricky staff, and I avoided them for future rentals.