For those of you who have jailbroken your iphone have you tried using backgrounder with Waze?

I ask because last night i jailbroke my iphone and installed backgrounder (to run apps in the background hoping to save some battery while using waze).

My experience was that it kind of seemed like it was working but i wasnt really sure. I would enable backgrounder for Waze and then open another app (Waze presumably running in the background) and when i re-opened Waze i wasnt really sure if i had logged the miles that i had driven since i opened another app and had Waze running in the background. I think it might have worked but im just not sure.

Has anyone else used backgrounder with Waze? What have you found out?