When we picked up the rental car and were doing the walk around, Donna mentioned to the agent that the left front tire looked low. She replied, “We are on a hill.” I looked, and the way the car was parked, it looked like a reasonable response. After about fifty miles of driving we were thinking about seeing if we could swap cars in Orlando because it had a vibration that was bordering on annoying. At a stop for refreshments on all level ground the tire still looked low. We put some air in it and the vibration went away. What do you know? Never doubt Donna when she says a tire is low!