OK - picked up the car this morning and drove it home (about an hour)... the car is much more driveable than ever really, picking up much much better from 3000-4000 rpm particularly (and also not tailing off past 6000 although I only got to try that once!).. gathering speed from 80 to 100 in 5th on the motorway it feels significantly improved - you put your foot down and stuff seems to happen quite a bit more quickly.. I would say the car is 10% faster
the car starts and runs perfectly fine and there are no problems noted so far! both me and TDI were pleased with the results, especially in the torque curve!
to give some indication of the cost:
total cost is hard to quantify as I had some other work done at the same time, however fitting the ECU must be under an hour and TDI used 3.5 hour of dyno time to tune the ECU (most of the gains came from adjusting cam timing) at £95 an hour..
so lets say 400 quid fitting/tuning and the ECU was 965 - and then add VAT = £1570
more impressions will surely follow over the coming week or two