Finally got around to fitting my pedal box+ to the new GTI (~1,000kms). I knew what to expect, having run the 'box on a 2017 1.4 TSi, but nevertheless was delighted at how well it integrates with the GTI.
One benefit I haven't seen raised before is that now the throttle and brake pedals have a much more consistent feel and application. Pre-PB+ the brake pedal was sensitive, but the throttle pedal mushy. Now the feel across both pedals is much the same, leading to a more responsive and connected feel to the car.
My 7.5 GTI now has the same instant, responsive, muscular feel to small throttle inputs as my beloved mk5 GTI.