Lot better than normal boost controllers. Reads boost levels and uses an electronic valve to controll boost levels. Can be programmed through the gauge. It has an intenal MAP sensor that can read up to 29PSI at sea level. If higher than 29PSI, then you must use an external 5bar MAP sensor (have it for sale). Also can use the 5bar MAP sensor for speed density too. Since it uses a MAP sensor, it will read low, since we are at high altitude in Denver.