There's no doubt they will be very good and quiet so no darth vader noise.
I had a forge twintake and have sold it and went back to a carbonio with panel filter and the car performs much much better than with the twintake.
I find when you fit an intake on k04 it takes all the low down torque away (the initial pull on light throttle)
I've tried dblias, twintake, pflow, bsh and everyone of them suffers from it, great if you drive flat out everywhere as the intake gives slightly more pull above 5000rpm.
Since the APR intake has been designed and tested with their software airflow readings should be spot on and performance very good.
Don't get me wrong if I could get a o e of these at a good price I'd have one in a shot.
Until then I'm enjoying my quiet and quick car with a little bling under the bonnet.