I finally installed Eibach front sway bar yesterday.

Although I don't feel dramatic difference in terms of initial turn in response i was looking for, the car does feel very good around curves.

Before, with the stock suspension, I always though the Z felt a little bit like a small boat with lifted front and body roll. Now, the car feels balanced with even body rool in front and back. I haven't experiend any other brands, but Eibach at stiffest feels OEM & RIGHT.
( If I were to hand over a key to a stranger, i am sure the person won't be able to tell its got the aftermarket sway bar. )

I am no pro by any means, and not sure what i felt was right.
But just wanted to share my feelings about the sway bar. Hope this review can help someone.

Same here. It feels about perfect for the street. Minimal body roll but still comfortable.