I got to drive Dawgdog's car yesterday for an extended time. It was mainly to get a feel for the Akrapovic exhaust in various conditions since I am seriously considering it. My car is also my kid carrier so I want to make sure it's livable.
With that said, I was most impressed with the GC kit on Dawgdog's car. It is firm but very well controlled. And actually not that uncomfortable. The car felt very planted. I liked it. They only drawback to me is the fact that although the EDC remains fully functional, it's hard to tell any difference between the 3 settings.
Current: 2009 E90 M3 | SG | FR | 6Speed | Akrapovic Evo | JRZ RS1 | StopTech Trophy | Cantrell Brake Ducts
On order: 2016 F80 M3 SO | AB XT1 | ZCP | etc.