I have the Tein S-Tech springs with Tokico HP-Blues on my ride. It's hot, there is no doubting it looks good. But when you put that in combo with low-pro rims you lose a lot of ride comfort. You dont notice it so much on the highway as long as there is not any construction, but you do notice it considerably in the city if there has been a lot of torn up roads where you live. If you happen to live in a perfectly paved city you will love it. Atlanta however is about as smooth as sliding down a mountain on your butt naked.
Cornering is definately wicked! I take turns at speeds you really probably shouldn't take turns at but you cant help it because you feel like your car is on a metal track and it just makes perfect turns all the time. It also got rid of a lot of my wheel hop. I used to have terrible wheel hop when taking sharp corners but now it's virtually wonderful.
You feel a little rattled here and there on rough roads, but it's still worth it. As for ride heights, it lowered my front about 1.6 Inches and my rear about 2.0 Inches.