Well if it's Fox you can save on taxes that is a given since they are off airport and you need to take an extra shuttle. I read many forums and some liked Fox for 1 or 2 rentals then met up with an hour line picking up. I by pass it all either with Alamo/Dollar/Budget. Have their "express" cards which are free of course and usually never takes more than 5 minutes to be on my way sometimes lees.