the ride with the the Lowered Bilstein springs and sway bars is definatley firmer and can crash over some bumps but mind you with the stock setup the car was leaping over the road through the same pot holes. Also a big factor will be the tires you have on your car. the stiffness of the side wall is noticeable.
I guess for me the real test was from the seat of the pants of my wife. She thinks the ride is very good and has no problem with the stiffness of the set up and she is definable not into performance cars at all.
And best of all,, I love it.