Just activated it tonight and went for a short drive and wow! Was super impressed, I managed to achieve 30.6 mpg, I would usually get around 27mpg in the exact same driving conditions on Auto. Pretty excited on what a difference it'll make in local driving as I usually average 10-12mpg. Massive difference to throttle response on the highway, it really doesn't feel like going anywhere but driving local back home seems to be more than adequate.