I recently swapped stock sway bars with RD Sport kit.
You can feel the difference right away. The car feels stiffer and the body-roll is definitely reduced. Both front and rear bars are much thicker than the stock bars and can be adjusted within a few minutes right at the track.
The installation process is PITA. It take a out 4-5h to replace it if you know what you are doing. I should probably say it takes about 30min to replace the front bar, and around 4h to replace the rear.
Overall I am very happy with the product and the results and can't wait to take it to the real world testing "track"
This is something I would definitely recommend doing if you are looking to reduce body-roll.
I will post a few pictures soon ...