I have Eibach springs with E36 M3 bump stops. Only difference (as I recall) from Dinan kit is that I didn't shave my guide supports.
I've been really happy with it, still retain EDC, although it is slightly firmer, and squat, roll and pitch are less prevalent now and I don't bottom out on the bump stops.
The drop is subtle but just enough to clean up the gap. I have about 17k miles since I installed.
2008 E92 AW 6MT ///eibach's///ARC-8///Muffler Delete///104k orig rod bearings