I just installed eibach and bilstein sport shocks and I don't feel that much of a difference from my OEM sport suspension in terms of comfort. The OEM sport suspension on the c280 sport where harsh to begin with but still civilized. The same goes with the eibach and bilstein sport shocks, the car is alot more solid now, it feels like you can drive forever it just eats the miles up. in terms of cornering it is better then the OEM sports but not by much. Also alot more responsive and it feels like the car is telling you where the wheels are (this could be do to it been lowered). The only thing that I dont like is that the rears dropped more then the front. I well have to buy #3 spring pads so I can raise it up about 1.5cm .