[AndyJudge]

I've a 2015 D5 AWD Geartronic with Polestar & yes it makes a difference.

Using it in normal auto mode the car has a bit more grunt than standard & is generally a bit more responsive than a non-polestar car (I had a 2012 D5 AWD Auto to compare).

Sticking it into Sport unleashes the beast, the car accelerates with a lot more urgency from low speed/standing starts. At higher speeds the car changes down readily without having to bury the throttle to trigger the kickdown switch.

Mpg impact I've not really noticed a major hit, the car reports about 36-37mpg mixed driving which is around what the previous car was returning.

On a run at a fairly steady speed I'm getting about the same Mpg as well.

I'm glad I spent the £695 to have it mapped when I purchased the car.

The little blue badge also looks great on the Caspian Blue paintwork as well