Kayak was the real problem
Cons: Kayak offered a car that wasn't located at the airport even though I specified the airport. Hertz wouldn't honor or change the reservation so I had to start over and pay again. Hertz wouldn't event transfer the insurance purchase. I took almost an hour to start with the virtual staff, a manager, and a desk agent before getting a car. In the end, it cost me $79 to rent a car for 8 hours. I'm done with Kayak and Hertz.