I actually started this thread before our trip in July. I did rent from budget through Costco for that trip. They let you add your fastbreak number but it didn't matter because my flight was 15 minutes early and my paperwork wasn't ready so I had to wait in line about 15 minutes. I was surprised because this was last July and the airport was EMPTY. I was a bit spoiled because Alamo lets you pick your own car but the car waiting for me was in my car class. It wasn't terribly clean but otherwise okay. When returning the car the attendant was busy and after waiting for quite a while, he said just leave the keys and go. While sitting at the gate 30 minutes later I get an email with an extra $20 charge for fuel. I returned the car full. I called and gave them the name and address of the gas station (at their request so they could make sure I fueled close enough to the airport). They eventually credited me back part, but not all the fuel charge.
I am taking a quick, last minute trip in Feb. and again, budget is the cheapest by far (though still very pricey for 4 days), but I refuse to rent from them again. Anyone have a decent mid Feb. rate anywhere else?