Nothing
I was able to complete my car reservation, everything was good. Then the day before I was supposed to pickup the car, I was called by a careless Enteprise employee indicating that they had no availability and that I should keep looking for options. Again, no indicating during the booking that this company didn't have cars available. Called Enteprise directly and the customer services and rentals manager himself told me that either I had to look for more options myself, or they would give me a similar car they had in a different location but for which the price was twice the amount I had initially booked for. I asked them to match my initial price because at the end of the day this hasn't been my fault, and the guy said that wasn't possible because 1) they never do that 2) I had booked through a 3rd party (aka KAYAK)... awful!! I ended up booking a much better car with Ace Car Rentals that actually costs 20$ less that the price I had gotten here through KAYAK and Enterprise.