Tiro,
my chip too has, imo, performed. But how well it has performed I will not know as have nothing to compare in with.
This, I would say would be the position of most people who have a chipped car.
Compared to a std car, any car with a chip giving an extra 40/50 bhp is obviously going to feel 'Great' but how great is it realy?
Without a head to head comparision, most of us will never know.
All I know is that a well respected VAG tuner has taken several APR maps out of VAG cars. Now, that must raise some questions in my book.