@ White lady, i had serious issues with my DPF on the car and looked into the Miltek option. One tuning
shop said it was great, and he was only authorised place here to fit them, went to another tuning garage about 10 miles up the road and he was blantly honest with me saying that Miltek had pulled their product because this wasn't a 100% cure. Yes cars are putting in the region of 220 BHP, but after couple thousand miles, serious problems start to arise, worst i heard was a car blocked the pipe, choked up causing it to overheat and then set the car on fire.
So i didnt convert mine, and even decided against a re-map. And to cure the on-going issue of the DPF forcing car to do bad things, SEAT garage had to replace exhaust sensors and never had
problem since.
So my advice is do a bit more research before getting the work done.