<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by back seat:
I have about 12 hours to kill in SFO and was going to rent a car. I was very surprised to see a $12 fee for common busing.</font>
I'm assuming your #1 Club. Otherwise, expect to spend 1 of your limited hours in San Francisco standing in line if you rent from Hertz at the airport.