I run these in my GTT. very stiff. bearable on the softest damping settings. they are pretty much completly rooted now and just bounce and skip around the place. Thats after about 20,000 - 30,000ish k's daily driving.
Mind you, when i first got the car with them in it felt great.
I would sway towards the bilstein/king spring setup if its a daily car - its what im looking at and ive heard nothing but good things.