I prepaid for a sedan for two days. When we arrived in Pittsburgh we upgraded to a BMW X5 (which btw was an older model) for what they said was $65 extra per day. So we're like great, lets do it. Well even though they quoted my time for having the vehicle two days, they charged me for three. We had the car for about 50 hours total, which was originally noted in the original prepaid agreement (when they charge me for two days).