It really works!
the other night I was running my ZXT with the V trim TO4 at 15 psi of boost but witht the gain controll in the SDS computer very low (little fuel, but no knocking), in 3rd, with the pedal to the metal at 15 psi, I reached for the gain button and WOW!!! I really FELT the kick when the injectors came in with more fuel! I repeat, REALLY FELT IT!, it was like another 30 hp easily.
The unit does not have all the goodies the HKS AIC has but it cost 1/2 the price or even less!