Over on the Hertz forum, a lot of people complain about Hertz not giving upgrades, not giving upgrades to clean, fun, low-mileage vehicles, such as an upgrade to a 35k mi scratched up smelly Impala, or giving an upgrade within the same class without much of a discernible difference, such as Camry without a sunroof class F to Camry with a sunroof F6. If you want real "choice," go with National.