I have tried the Sport button now and it seems to make steering a bit easier on long straights (because it is heavier to turn the wheel, it is easier to hold when on Cruise Control). Still not sure whether it is worth the added effort, but then again, my whole driving is aimed at using as little fuel as possible (£1.09 at the moment)
I am also still running in, so the first 3500 miles, I am not doing more than 1000 revs (or was that the other way round?

)
I am calling the satnav lady "Hillary" for the moment (because I don't know what to make of her), but will settle for a better name if there are any suggestions...