Expect a true formal review in the coming weeks (complete with pics):

I've had my Tein H Tech springs in for almost 2 weeks now, and today was the first time I finally got out on the highway. It was about 9:30, and pretty empty out. First thing I did was see how fast I could get going. I got going and hit 120. Before 120 felt very lofty and unstable, but now it was relatively solid, so I kept pushing it. Just barely made 125. By then, I was almost up to the curve in the highway, so I left off and took it at 115, and it was very stable. Also, slowing down from that speed finally warmed my autocross pads up enough so they'd operate at full potential. After I got off, every time I had to use my brakes they were way more responsive then they had been. Overall I'd have to say these springs are a big improvement in both high speed and low speed handling. Ride quality is about the same. The drop is only slightly noticeable. The average person wouldn't notice unless I was parked next to another car identical to mine but on stock springs. Anyway, if you need to have ground clearance for whatever reason and want something better then stock, look into Tein H Tech springs