My '04 LS430 has the standard suspension, but I did test drive an LS with Sport Suspension when I was deciding on options. I thought the Sport Suspension was very compliant over bumps and potholes. It was not as severe as BMW's sport suspension. The primary difference I noticed was the Sport Suspension was a little more "active", that is, road imperfections were transmitted more than the standard suspension. Some of that could be due to the 18" wheels, which are standard with the Sport Suspension. I believe the changes in the suspension are thicker roll bars, stiffer shocks (and maybe springs). All of those components can replace the same parts on a standard suspension car without any electronic problems, since nothing electronic is involved. I assume the parts would be pretty expensive.