Pros: Nothing.. Actually the euphoric feeling receiving a confirmation for a convertible whilst booking a day in advance was rather favourable..
Cons: Really didn't like showing up at Hertz rentals, with my confirmation number in hand after waving good bye to my ride feeling confident in my rental confirmation that I would be just fine; only to be told that my confirmation was worthless, they had no vehicles available. Furthermore when I replied that I had used "kyak" I was told that they hold no validity as they do not have access to the hertz inventory so they cannot accurately reserve anything!!! Thanks KAYAK! For making my wife's birthday a memorable experience.