I had my Milltek fitted by Vagtech last week and the difference is very noticeable, well worth the money.
I went for the FR 1.8T version and there are couple of things i would like to warn people of before they do the same thing:
The Rattle:
I had a rattling noise which when i took it back to Vagtech turned out to be because the way the tail pipe section sat, it was knocking against a bracket which holds the brake fluid line. I'm guessing that the extended exhaust system from Milltek would have avoided this
problem.
I'm not sure if the bracket on my car was wrong as on the other drivers side it was smaller and a different shape but unless Vagtech hadn't "adapted" the bracket (30 mins work free of charge which they didn't have to do because I asked them to order the 1.8T FR version) thanks John, the only other thing to do would have been to move the tail pipe section back to compensate for this. If you read further you will see why that was not an option...
The Tailpipe:
As Ant FR said, the length of the Cupra bumper is different to the FR bumper which means that the tailpipe now sits flush on mine. (Moving the tailpipe section back to compensate for the rattle above would have made it sit stupidly too far back).
When Vagtech said that the whole system extends when warm (just as Big Boys Toys did to Ant FR) i was a bit dubious but when they showed me I saw they were obviously right, it extends about an inch which then makes it sit alot better. To the point where i am happy to leave it like it.
Conclusion:
So really if you have a Cupra and want to get a Milltek system get the extended Cupra version otherwise like some people have said, the FR one does fit and sounds great but you will have to put up with it sitting flush to the rear bumper until you start driving it for 10-15 mins and if your car is like mine there is that risk of it potentially knocking against the brake fluid line bracket and you might not have tuners as helpful as Vagtech who will sort it for you FOC!!
Hope this helps.