I was there for the installation of this on vrago's bike. To say the least I was skeptical as well of this, but given that he seems to have his gear pretty well sorted and it was his C note on the line, I was very curious about it's effects.
Frankly I do not recall if I rode his bike prior to instll or not, but I was able to ride it after install.
I cannot verify any hp increase or otherwise, but what was VERY impressive was the INSTANT power upon throttle! With my FCR41 I have to get into it a bit before wicking it up rapidly. That was eliminated with Power Now.
I will definitely be adding this to my list of to-do's for my bike.
Thanks for being the guinea pig vrago