well, maybe if it was winter you'd get some responses. i have a rear sway on my r18, and i honestly don't feel MUCH of a difference if any at all, or that could be that i just dont pay close enough attention. i know the bar is doing its job when i take harder turns, but my lil civic still gets blown around in the wind and on the highway.
and btw, inside and out is definatly the wrong section for a post on rear sway bars. try bolt-ons