My last experience there is they have a shuttle on a schedule. Schedule is pretty closely met, but allow plenty of time and make sure you meet the schedule. Miss a trip and it may be an hour or more til the next one. Not as convenient as having a car available, but lots cheaper than renting one.
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Obama 2008: "Transparency, C-span, Openness, Post Racial, Bipartisanship, no Earmarks, fiscal prudence, no taxes on the middle class, close Gitmo."
Obama 2009: "You fools really didn't believe all that sh## did you?"