Cons: Kayak should tell people about the rental car policies. It's not as easy as it sounds, especially if you don't have a credit card. Sins rental car places don't take debit cards, and the ones that do run a credit check. If your credit is bad, they turn you away. Kayak need another layer that checks for that before booking .. I wasted my time going to the car rental place to learn I could not get a rental car or pay a hefty hold fee.