The problem with Priceline is what if the price drops? Here is an example: Last year I was taking my family to WDW at the same time as my wife's brother and his family. Car rates were in the $200 range. My DBIL booked with Priceline and was quite happy to rub in that he got his car for $170. 3 days later the prices dropped to $87. I'm not saying this will happen (prices really don't seem to be budging lately) but there are risks using Priceline since you need to pay up front.