I installed the PC and set it to SPORT+ +4, This is full race mode and felt amazing, made my car feel faster, no increase in HP but is faster the moment you use your throttle so yes the car is faster!
In Sport + or Sport mode the car does feel faster because of the responsiveness, the car wants to go!
Because I drive my car daily I set it to city +4 and it's much better than OEM.
Im loving the Pedal Commander, if you race your Q50 you need this, for daily it's better than OEM but you can live ...