Does anyone have any experience with Racing Dynamics Springs?

All I know is that they drop the car 1.5"

Welcome any input here.

 

Been running the Racing dynamic lower springs for about 3 years now. Have them on a 03. There a little not much stiffer than stock for little bumps and shakes.. but they let you know they are there on a decent bump. Handling is much improved like majority of the kits. So im very happy with them

 

are those progressive rate?

 

Thanks, I have an opportunity to pick up a set really cheap which is cool but then it made me wonder.