i just got through talking to the guy (Steve Shelley) and he seems to know what he is talking about. He has a 5000 mile Satisfaction Guarantee. I asked him exactly what he was guaranteeing. He said "that you are satisfied! If you don't think it does what I say it will do just send it back and I will give you your money back." That is hard to beat, especially for a 5000 mile period. That should be plenty of time to really try it out.
He is using EFILive and other programs for different models. The tune adds about 65 hp and 100 ft/lbs of torque. I have read lots of EFI users claiming good mpg and hp gains together.
Since he has the 5000 mile guarantee, I ordered one today! What have i got to lose?
He guarantees a 20% fuel economy gain at 65 mph. With the miles that I drive annually and fuel here at $4.50+ per gallon, I should save over $1700 in a year. If it does not work out, I'll just send it back. No harm, no foul!