I have not tested long sweepers.
I have taken some medium radius 80 degree turns on pavement between 70-90 kph
Immediately noticed a firmer, sharper feel at initial turn in (same good feel on quick lane changes).
It seems to have induced more over-steer, but that may be due to some other factors.
I have not had a chance to push it far or often enough.
I suspect I will hit the tire grip limits (stock) before this equipment is fully realized.
I also suspect that upgraded coilovers (and other suspension upgrades) will unlock more potential.
It's pretty light.
Ground clearance lost is about 2"...I'll see if I can remember to take a picture.