Agreed, can't go wrong with the dtuk. Also recommend the pedal box, makes the car feel so much more responsive. I've run the dtuk box on my gtd Mk7 for 40k miles, and the pedal box for 30k miles. Totally transforms the car.
On that note, will be posting this week in the for sale section as I am selling my dtuk box and pedal box, as I'm finally saying goodbye to the gtd (5 years old now), so you would be welcome to them if you want to save some money (box is the crd2+ and not the crd3+).