I really like my
Ground Control school kit. I purposely went with soft rates (375f/450r) so that it'd be comfortable for everyday driving while still capable for the occasional track day. For street, I set the shocks at 1/2 turn from full soft and find it perfect - still handles way better than factory but no jarring effect even on the worst roads. It actually rides softer than my old 135is that had BMW Performance shocks + Dinan springs. Height wise, I'm basically 1/2" lower than stock so to anyone else it looks factory (i.e. not slammed).
Also think the kit is reasonably priced considering it includes camber plates, rear shock mounts and rear spring perch plates.