Believe it, it really works. Kills KR flat off with a 50/50 mix of distilled water...but I've been slowly moving up to 70%, then 80% and I'm doing a 3.0 daily now, no KR...but when I hit 100% it really leans the car. And then I'll start to get KR in the mid range of 2nd gear. The reason I want to go to 100% is to keep from slowing the flame front with the humidity of the fuel mixture.
I don't really have many official times with it though, the last time I went to the track was over two months ago right after I put it on, and the PCM was pulling all of my timing at launch because of TM. Now that I've taken 99% of it out, it may be a different story. 107 MPH trap speeds should put me in the 12.80's easily if I can keep the timing up at takeoff.