We have a Miltek fitted on our R32 Golf Mk5 and its brilliant! Cat back system like yours and it brings the car to life noise wise!

When pottering around town you will never know its an aftermarket exhaust! A quick blip of the throttle and it gives an awesome raspy V6 sound...very throaty...

Used many systems in the past and this is up there with the best of them!

You must get some videos of it in action...my wife wanted a S5 but it was a little out of budget so we settled for a R32 instead for now