i used Awesome Gti in irlam manchester, cracking service on our bora, found some underlying little issues before doing the map, nothing that cost money though.
there was a christmas special on at the time and cost £200, at first it highlighted a worn clutch and was a bit smokey, however the smoke was due to a leaking intercooler and therefore not metering the fuel correctly.
the system used was revo maps and is like lightening compared to before, our 130spec tdi was running 170bhp afterwards and absolutely trashed my mates a4 conv 210bhp up the Mway, he could have caught up if his speed rose much more than triple figures i'm sure though.
fuel economy is a bit better, but at best i've seen 62mpg on a run, i don't exactly drive sensibly it has to be said though.