What I noticed: Because of the sports suspensions, I noticed that after long drives the car's handling seemed a bit sluggish. A few months after having fit the suspensions, I noticed that the steering response in general had decreased. These problems were mainly occurring because the original bushes are made of plastic which is fine unless you are running sports suspensions, which tends to heat up the plastic bushes to the point where they are no longer doing their job efficiently.

After fitting these Polyurethane aftermarket bushes these problems have disappeared. The steering has become much  sharper i.e. more responsive. I haven't noticed any increase in road vibration, if anything the car seems to handle better overall, this is  including over speed bumps and pot holes. This mod is a must for anyone running aftermarket suspensions.