It's really hard to describe. I say before it felt like the front was pulling the back in turns. Now, the back follows the front. Almost like a 4 wheel steering sensation. No roll, no understeer. Almost feels like the back is going to come around but it doesn't. WARNING: This mod will cause you to take corners faster and increase the risk of a ticket .

 

Exactly as NJ says. I would also add....more predictable handling. The back wheels do the same thing on the same bump (in a fast turn at the limits).

If I was asked to drive fast on a track I would be able to drive for much longer with the heavier rear sway bar. The car is more "Zen" now.