I'm probably 3in if not more lowered and the only time I scrape is on inclines that level out, no problems with speed bumps. Aftermarket exhaust is what usually scrapes to.
As you see in the pic of the coilovers in the box it's just that easy, ride is super smooth and very stuff around corners no body roll at all. Yes you feel every single bump. The front is strut and spring, the rear is a shock and separate spring. Look closer at the pic with the gold camber kit.
The d2 coilovers is a complete strut and spring assembly completely adjustable. The rear is max low and the front is up a little bit cause I was havin troubles turning.