TOTAL RIP-OFF - my Dad booked a rental car through Alamo's booking agent, Hotwire. They have an undisclosed condition in which you not only cannot cancel or change a reservation, but you lose your reservation within twenty-four hours if you are late in arrival. I had an experience in which even though my dad had a car reservation for 10 days through Alamo (which he paid $441.25 dollars for), he was denied his rental car because he arrived over twenty-four hours late (even though he already paid for the car!). He was then forced to pay for ANOTHER reservation and had to pay for TWO cars, one of which he never received! ABSOLUTELY HORRIBLE, HORRIBLE CUSTOMER SERVICE!