Has anyone had experience finding better Budget Car Rental pricing on websites other than Budget.com?

I did a reasonable amount of searching to see whether Budget.com had the lowest rates. My conclusion for the dates & cities I checked against about a half-dozen websites, is that Budget.com had the same rates for all size rentals. (I checked primarily against Travelocity, Expedia, Orbitz, & OneTravel & Sidestep.)

I want to make sure I am getting the best rates. In addition, according to the Budget.com website, If, in the unlikely event you find a Budget rate on a distributor’s Web site that’s lower than (and not equal to) the rates on budget.com, you can qualify for a free-day rental certificate. Here's the link:

https://www.budget.com/budgetWeb/htm...ebenefits.html

Thanks for any info/experiences you may have to share!!