I got a tankful the other day. I drive a stock r33 s11.
Have to admit that the car goes noticeably better, with the biggest gains experienced at mid revs (probably because of my restrictive exhaust), but it's def got more torque.
Potential for better economy when doin the granny thing.
I'm just scared of it eating away the plastic components of my fuel system, so i'll only be using it every once in a while. I saw that thread that showed the pics of hardware that's eaten away in ethanol. Not a pretty sight.