I booked a car rental through rentalcars.com, stating that I would be picking the car up after 11 PM. They booked me with NU Car rentals based outside of the SFO airport. Details they failed to get right were that NU Car rentals are not on-site and more importantly closes at 10 PM. I was left stranded at the airport that night. I was not able to reach anyone from rentalcars.com to try to rectify the situation but did contact someone at NU Car rentals corporate office who immediately canceled my reservation. I am currently in dispute with Rentalcars.com on the charges, which they have so far refused to issue a refund. Renters beware. This company is difficult to get in touch with once the reservation is placed and will give you the run-around should there be an issue with your rental.