Mark,
More than happy to give feedback given the service was so excellent.
Biggest thing for me was the continuous power delivery all the way through every gear. The car picks up and just goes. In contrast to my initial perceptions of me wheel spinning and being thrown into the back of my seat every time I touch the accelerator I actually find the car far more drivable. I think as the delivery is more instant and contiuous the car is easier to anticipate, you get more feedback and it feels more natural. It's how the car should have been.
I have noticed a drop in mpg though whilst cruising on the motorway but it's nothing significant.
Once again thanks for the work, I will definitely be recommending this upgrade to others and for you guys to carry it out