I used them for a recent trip. Without telling me, they added on a $192 extra fee for something called "Carla Plus." I contacted them within minutes, and they refused to refund me. They also told me that all fees were paid in full, yet when I picked up my car, I was charged almost double the total price of the car. Carla tells me that they would "let their escalation team know" and that they would be getting back to me. It's been almost a month with no contact. Would not recommend.