Im very happy with my KW V1's... The improvement over stock is huge!
There is a lot less body roll in the turns, the nose dive under braking is almost nonexistent and it's definitely planted on bumpy roads & turns now
I like how easy they are to adjust too... I first started out with a subtle drop, but I have since lowered the front and rear another 1/4" and even though I lowered it more from the original install, the ride quality hasn't changed at all.
Here are some pics of the drop before I lowered it a 1/4" more... There is much more adjustability left too, but I can't lower the rear anymore, because the tires already slightly rub if I have the kids in the back seat and I hit a big bump/dip in the road... I guess I should roll the fenders
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2009 Z4 35i 6mt, SpeedTech 6266 Gen2 turbo kit, Tial WG, VRSF 7.5 race IC, ER charge pipe, Tial BOV, Radium Fuel cell w/ surge tank and twin Walbro 525 pumps, Radium FPR and return line, Bluetooth ethanol sensor, Phoenix intake manifold w/PI, JB4 tuner, PR coil packs, Custom oil cooler, ECS Radiator, Spec 3+clutch, Mfactory flywheel, single 3.5" into dual 3" exhaust, H&R springs, 19" TSW wheels, 235/19 & 275/19 RE11 tires