Yeah, the rear sway will help A LOT in making the car more neutral. I find it quite a bit more fun to drive now, and am still waiting to see how it compares.. or how much faster my times will be autocrossing this next weekend. As long as it makes up 2.5 seconds (on a mile course) I'll be beating the modded STI and EVO.
I got the progress, and many people that had the S/T switched to the progress, and were very happy. So its worth the 170 shipped.