If you compare renting a car to say, renting a tuxedo or rototiller, car rental is a bargain, no matter who you rent from.  But there is still huge variability between car rental rates. For many years, that variability corresponded directly to convenience.  Rent from Hertz, and you’d pay the most, but your car would be on an airport lot, and you wouldn’t have to wait on an endless line.  But as large airports move their car rental lots to remote facilities, and technology allows the discount car rental firms to provide faster service, the price/convenience consideration isn’t so cut and dry anymore. 

I’ve been renting from Dollar these days.  They generally have the lowest rates in the US, and by enrolling in their Dollar Express program, the time from shuttle to street is just a few minutes slower than my Hertz Gold service.  Use the BKB Corporate Discount code BR0719 for an additional 5% savings on most rates.