For the uninformed, they sell this a green technology for the voters, reality is you get better performance from biofuels as they have have a higher octane rating and suffer less from bad detonation. Many car enthusiasts have been onto this for some time, getting big power and torque gains when converting to biofuels. That said, it also burns a lot more fuel than your typical OPEC based fuels.
I'm sure you can find many examples online of these claims, take a look at the one below to see how many happy customers are now running this super juice!
http://www.skylinesaustralia.com/forums/Guilt-toy-Running-E85-t239271.html