See my review. In short, with hindsight I wouldn't have bothered with the suspension. DSC wasn't available at the time. But I don't track my car. So others who do may see gains from having both.
So in a way, if you have a fully working stock suspension, add a DSC controller then you don't need to buy Litcho suspension...? as the DSC is doing a similar job, but with even more granularity...1. I love a gadget.
2. Litcho suspension cannot dynamically adapt its characteristics to the forces acting on the car when driving. The DSC unit can and does.
3. The DSC unit allows me to tune the suspension to my requirements. Reduced diving on braking, reduced front end lift on WOT (my main requirement actually), reduced body roll as the DSC unit applies differing damping forces to each side of teh car.
4. Much softer comfort but with reduced wallowing that softer damping rates can bring about.
Lots of reasons why an adaptive suspension controller makes our cars' suspension (whichever Bilstein version you run) better.
My only gripe is that teh DSC unit end user software is not intuitive.