Just want to say WOW and thanks autoslash. Saw this thread awhile back and persuaded my hubby to give autoslash a whirl. Long and short of it was for a 14 day rental from/to LAX, by using autoslash, we saved between $250 and $600 depending on the car rental company we had looked at. We did not go the prepay route, fabulous service, no issues - hubby is now an autoslash convert!