We are two families from Germany and we spent three weeks travelling in USA, mostly Florida this summer. Most of hotels and other services were pre-booked by our travel agency, including the car rental. My cousine has Avis Preferred Service membership so we asked specifically for car rentals at this company. What was striking was the difference in level of services provided to Preferred members and other customers. While we got service and attitude that can be described as satisfactory at best (and often worse) the other family got VIP treatment in every aspect. This was true regarding waiting times, upgrades, communication by telephone and everything else. So, I do recommend Avis, but only if you plan to become their Preferred member...