I have the Tokico Illuminas on my car. I didnt get the springs - I heard they were junk. I went ahead and got the eibach pro kit to match.
I've gone about 3-4k miles on them so far, no problems whatsoever. There is a very big difference between full soft and full hard. My car is now nicely lowered, not too low but a very nice compromise. About 2 fingers in front, rear is completely tucked. The ride is very compliant on full soft - some people cant even tell I'm on aftermarket suspension. I use my car to commute around LA so I've seen my fair share of potholes. Lifetime warranty and the company is located in LA too. Plus, my moms coworker is the co-owners wife. Too bad she couldnt hook it up....GRRRR.
I went to the track with them and like an idiot, i got the numbers mixed up and put it on full soft. Yet the car handled like a dream! I was outrunning s2000s, rsx type S's, and even a WRX. Its really a good deal compared to the Koni SAs - they cost a LOT more and have the same functions and features.
I know its weird to put japanese parts on a euro german car, but it was an affordable solution for me. My only grip - the adjusting mechanism is quite flimsy. Its just these lil plastic piece on top that you turn with a screwdriver. Plus, in the rears, you'll need to remove the speakers everytime you wanna adjust them. Fronts are really easy.