Just installed these, greased them up, and went for a test drive. I immediately noticed less lean while turning and better handling overall. For $40 and half an hour of my time, I'd say it was well worth it.
My OEM rubber bushings seemed pretty soft, but they weren't cracked or anything. Still, the poly made a noticeable difference.
ditto
11 year old bushings from my camry still looked great when i swapped to poly bushings as well.