Thanks for the tip. I wouldn't mind using them, but it's so pricey. They offered a great price on a Traverse from Fri-Sun but when I extend it to Tuesday for my trip (my plans changed), it because almost 4x as much to rent. The corporate rate seems to trump the pay now rate, but it is still on the more expensive side. The Emerald club ability to book a midsize (for one of the best rates I've seen so far) and pick any car on the lot is an attractive idea.