Vogtland springs?

[11socal50]

Does any have info on Vogtland springs pt. # 953084? I found a set locally while patrolling craigslist, and after googling them I was unable to find much info. I did find a thread where someone said that he preferred them over eibach and steeda but other than that not much.
My 2011 GT is my dd but I do enjoy taking it into the canyons.

 

[corruptor]

Vogtland makes the Steeda ultralites. They are progressive springs. The difference from the ultralites are probably ride height and spring rates

 

[11socal50]

I read the drop is 1.2 front and rear on a 05-09 GT, not sure if the 5.0 would be much different.
I should have been more clear, does anyone have first hand experience with these? Ride quality, performance, etc
I know suspension is subjective, but I would like to hear opinions regardless