National is a great car rental agency. Their pick anything in the aisle is a great system and I always feel like there is a lot of choice.
This past experience was even better as I went to my aisle (just the regular Emerald level, not executive) and the cars available did not have BlueTooth. The fellow assisting in the area offered me a vehicle from the Executive area which had Bluetooth and did not have to pay the upgrade!
Thanks National!!