I've had an excellent experience with this upgrade. 15K in, and still much better ride and handling. The bilsties are so planted compared to others.
ON RIDE HEIGHT: The setup settles over a period of months - down 5-8mm. The springs soften a tad. As previous posts have said, the taller settings on the rear ARE a bit more taut; however, that softens a bit.
I've been through nearly all of the settings. Initially, the middle one was great, and it would have continued to be. After settling, front and rear had about 3mm of difference in height at the fender well - though right at first, the rear was 6-8mm higher. I've recently put the rear to the highest position because I added a trailer hitch, and there are much more frequent loads to be carried in my new business. The rear is back to 6-8mm higher. The ride is a bit higher, and there's a minor uptick in that tail bob that we've been seeking to eliminate. Somewhat more squat on acceleration, too. I had tried the highest setting when the setup was new and found it to be pretty nervous. The tail bob this time around - with break-in, is less than 1/2 what it was when the struts were new.
RECENT UNRELATED UPGRADE: Replaced the cat-laden, narrow exhaust downpipe with aftermarket (Invidio, or something like that). Dang! Nice difference: much faster turbo spooling; smoother power; more power with the tune ~18% (at sea level); safe boost from 11psi to 17psi. This was the single strongest recommendation from a terrific local tuner: KSpeed in Reno, NV. Boy were they right.