Thank ya for the review. Been kicking a RSB upgrade around, but I don't want to kill the stock ride.Tim,
In straight driving on the highway, you won't notice a thing as the RSB doesn't really affect the shocks and springs if the car is travelling in a straight line on smooth pavement. You will feel a little less "jiggle" in the rear if you go over some bumps / etc and should notice the car is steadier / more planted when you change lanes. This will be more noticeable, the faster / more aggressively you change lanes. RSB's are about controlling side to side weight transfer that is typically experienced as body roll. In this case, the fact that the RSB is weaker than the FSB means that the back of the car experiences more body roll than the front when turning. Since most of the weight is in the front of the car, this exaggerated roll in the back of the car makes it feel light / unsafe in sharp turns. The thicker / stronger RSB limits the weight transfer during cornering, keeping the body in a flatter / more controlled stance, which makes the care more stable and feel more "planted" during a turn.
I added the Progress bar to my 2.0 Touring back in the fall and couldn't be happier, it is a Christmas present that you will enjoy all year.