Just did mine today. It tightened things up more than I expected actually. Can actually feel the rear come around quicker when powering out of a corner now. I honestly didn't expect tons from it, but I can definitely tell it's there.
Corksport front sway is on the way, and I'm super-excited to have the full set on, and waiting till spring for the H&R springs is gonna be difficult. Good work, Corksport!