I would say BIG effect on "all around driving". The car feels like it is many hundreds of pounds lighter and more "sure of itself". Kind of feels telepathic now as jetting from rolling position "A" to "B" feels instantaneous. Definitely an "overall driving" experience, and not just a "launch" experience. YMMV
Interesting. That's very attractive to me if it feels better driving daily. I am over 50 now, and we won't go into my long past of pushing cars to their limit, but these days, I don't really value an extra 1/2 second off 0-60 times on my daily driver when I can already beat just about anything off the line.
The really interesting part is that Julien says it doesn't change daily driving for him. So now I have to wonder if I will notice it or not. Wish they gave you a 24 hour trial.