Excellent
I rented from SIXT in Liberia, Costa Rica. The staff were wonderful and helpful. Everything went well. The thing I learned is to be sure to reserve a car online. We were debating whether to rent a car or use public transportation. We saw a price the night before and thought we'd ask at the desk. They gave us a much higher price, but helped us out after we mentioned the price we saw online the night before. The only down side was the actual car we rented (a Geely Azkarra). In my opinion, this car was just all around awful. The transmission was like a rubber band and borderline dangerous to drive in city traffic. You press the gas pedal and nothing would happen for maybe 2 seconds, then the car would spring forward. The car would lock and unlock itself, flash lights, etc depending how far the keyfob was from the vehicle. It got us around, but wow, what an awful vehicle to drive. But I'll still give SIXT 5 stars as they only rented it, they aren't the ones designing the building the vehicle.