I had to cancel a trip at the last minute, was charged a penalty for canceling flights and understood that as part of the deal going into this. When I went to cancel the car rental Priceline penalized me 100% or 500.00 for canceling. No future credit - nothing. Ripped off and I will never use this site again in the future.Canceling a car rental reservation in not more complicated than a flight reservation cancellation. Had I gone direct to Alamo rental they would have allowed the cancellation with a $5.00.00 penalty. They don't see a dime from Priceline unless I pick the car up. So Priceline pockets 100% of my money. Why would anyone want to do business with this den of thieves and crooks. Very strong fake American accents when you call and speak with them. Good luck understanding them!! Their savings amounted to 9%, not enough to brag about but a 100% penalty on a car rental cancellation is certainly something to complain about. My advise to all of you for the future - Deal direct with airlines, hotels and car rental agencies. At least you will have recourse and probably the same price and you will be able to understand them when they speak.