I've used them. They're ok. They're tubular v solid. I liked them on the softest settings. If you're going to track the car you'd need to experiment some in my opinion. I experimented some with the rear which made the rear rotate faster. A bit disconcerting at first if you're not used to it so I moved the front one setting stiffer to compensate which works okay.
Thanks, Dieharder. My car is an '05 former garage queen (33K). I just want to tighten things up a bit without going broke. I was leaning toward Eibach til I saw these.