For me, absolutely. I had no interest in adding things myself and hoping that it all worked together. It was more expensive but I love it.
For me, yes.
certainly, so if that's your top priority a JCW is probably not for you.
probably not, unless you plan on tracking it, but I'm glad I have the JCW brakes. Although I spend more time worrying about those behind being able to stop far more than I worry about myself.
This is the best part for me. In addition to being able to zip through the corners at the same time
Not for me - I love the row the gears