I am on the original ACT VW9-HDSS -(rated to 500/tq), that was installed at around 55k miles. It has been in for the past 60k at Unitronic Stage 2 hp right at 400tq, and the last several thousand miles with IS38 swap with Diggs tune via OS, at whatever the power level is (I honestly dont know what she is pushing now). She was fast is all I can say, and clutch was trigger quick engaging right until is wasn't.
Here is where I got mine:
https://www.maperformance.com/products/act-street-clutch-kit-2015-2017-vw-gti-golf-r-mk7-vw9-hdss
Will probably replace with their 6 puck setup and extreme pp.