Had it done yesterday, and honestly I haven't noticed anything because I never have driven it in "D" (where I think most of the improvement lies). My wife may see something after driving it. To me the change in paddle shifting is inconsequential as I am always in hand-manual.
There are a couple of legal things to be done besides the electronics - the original VIN label has to be changed because it was found that it could be removed intact, and the original VECI lable could become unreadable. Only certain vehicles with certain options get the battery upgrade (I didn't), and you are given an arguably better owners manual.
Update: My wife, a "D" shifter, has had some seat time and feels it is better now, though she still feels I can shift smoother in hand-manual.
There are a couple of legal things to be done besides the electronics - the original VIN label has to be changed because it was found that it could be removed intact, and the original VECI lable could become unreadable. Only certain vehicles with certain options get the battery upgrade (I didn't), and you are given an arguably better owners manual.
Update: My wife, a "D" shifter, has had some seat time and feels it is better now, though she still feels I can shift smoother in hand-manual.