First off it's a simple interface, it has two boost settings, a sensitivity setting and a high and low boost knob. However, when you optimize the gain for one setting it isn't necessarily optimized for the other. Still it's got a basic interface. However, if you're above average intellegence and want to tune in a little more detail I'd say the Apex'i or Blitz products would be a better choice. But for most people the Profec B is B for "Beautiful."
"The 300ZX Turbo is a dance; it's a song; it's rolling, roaring automotive art. There is no color that doesn't suit it. There is no mood-lifting chemical substance it can't replace." - Automobile Magazine