Well I used the Aero on a round trip on local roads to bed the brakes in a bit, and give the car a bit of a run, since it has been tucked away in our garage for most of the last couple of months.
It was great to feel the car roll back on a slope (!!!!), something the car has never really done since I bought it, because of the binding rear brakes.
Now that the calipers have been done, the car just feels different. I can't quite put my finger on it, but the car just feels generally lighter. I'll keep an eye on the mpg, because it seemed to be showing mid 30s rather than around 28mpg it used to show before.