Booked a car rental using their regular system (not Name Your Own Price). A week later, received an email for an exact rental from www.hotwire.com that ended up being $30 cheaper.
Priceline refused to match their price because you cannot which carrier Hotwire is getting the car from until after you make the purchase. So even if they are cheaper, it's not covered under priceline's guarantee. Bulls**t if you ask me.
Warning to anyone out there----priceline has an absolute zero % tolerance for refunding your money, ever. Even if the dates are wrong, you booked the wrong flight, wrong car, etc. Zero. That alone is cause to never use them again (not to mention their failure to match prices as promised).