I'd like feedback from anyone who has car rental experience with the rental car companies using the bid feature. I want to rent a car over Christmas in Miami, which is extremely expensive. I have already entered a priceline bid for $100 less than any other rate I can find (it was accepted, if I proceed and enter my credit card info). I understand the bidding concept and how it works; however, I am somewhat apprehensive about the actual car and service I will receive. I travel and rent often, so I have Gold and First accounts with Hertz and Avis and am used to receiving upgrades. I realize I can not expect that in this situation; however, I do want to feel comfortable about the end product and service I'll receive. I am interested in any experiences regarding the actual car and service received--good and bad. Thank you!