TMC Tuning box on 1.8TSi

So far so good. No fault codes and seem to be getting around a 5-10% improvement on fuel on my run to work, checked on a day by day basis. A couple of tankfuls should give a more accurate figure. Driving feel echoes what I had on Fabia 1.2TSi with it seeming to do everything that little bit easier. There is definitely more mid-range shove, where for me is where it matters. I've not yet had the chance to evaluate the performance extensively due to weather and traffic.