I guess you guys didn't opt for the Xenon HID package with your ZKWs.
I only had aiming problems with them, and I got them to aim low at first but they seem to re-aim themselves too high...not that it bothered me any, but at night I could clearly drivers in front of me had their cabins lit up with white light from my ZKWs.
Anyway...now that the weather warmed up...or whatever happened since I got them...they seem to aim fine.
The best test is to flip on your High Beams after aiming an dyour high beams should always aim well above your low beams.
Also google "Euro Ellipsiods aiming PDF BMW" and you can find the print out manual for aiming ZKWs and all Euro Ellipsiods for the E36 and Z series BMW.