As I was changing out rims and decided to try the medium setting. Took it for a spin on canyon roads and it's really a monster now. I never got the feeling that I was going to lose it but it is much more aggressive on the corners.

Normal commute today was good as well, took a few fast turns and it was solid. True test will be when I push it past the tires limits at the track. But for now, I'll keep it on the medium setting for the daily driving.

 

I installed 25mm rear sway bar on my 2019 jcw and the improvement is beyond compare. The handling is so wonderful and I haven't lowered the car yet.

 

When I took my car to the track in New Orleans, I had the NM Engineering 22mm swaybar on the highest setting and no other suspension mods. The car handled much better than stock, but it still had understeer. How your car will handle will depend on what mods you have, your suspension setup and how well they play together. But, the 22mm swaybar, by itself, will not cause oversteer, even on the highest setting.