Looking to buy these soon, curious as to who has installed it, how long it took, how hard it was, just any general information about the process of dropping it and how much it dropped.
Thanks!

 

S Techs are deep drop springs, you'll be at least 2" lower and will need front & rear camber kits. Install is the same as any other lowering springs, not difficult if you've done a fair amount of mechanic work.
If you want a milder drop Eibach, Tein H Tech, Tanabe and Swift would be options.
Just google "S Techs G37" for plenty of images.

 

What about ride quality though? I've been told with just springs, the ride typically suffers greatly.

 

The deeper you drop the stiffer the ride, they have to beef up the spring rates the deeper you go so you won't be slamming the bump stops on a regular basis.