Matt.

Installed on a 2007 performance white Mustang V6 4.0L...
I've had the car out on the road for a while now and all I can say is wow. Ride quality is much better than stock. The car corners very tight. I have an odd mix up of suspension parts;

Saleen Racecraft 35mm front sway bar
Gt500 24mm rear sway bar (i believe that is the size)
Koni yellow shocks and struts
OEM v6 springs

Taking corners at average speeds around town gives solid feedback. The ride quality is firm, but doesn't throw you around in your seat. My 4.10 gears don't throw the hood to the sky either! It puts the power down nicely. I am more than pleased with my purchase and I'd recommend anyone on the edge of buying yellows, do it. I can't speak for anything other than OEM springs, but I am very pleased.

Mod list:
4.10 8.8 rear axle from a 2011 GT w/ '04 cobra pinon flange adapter
2011 GT lower control arms
k&n cold air intake with Bama tune
Hurst short throw shifter
Stainless works long tube headers
Thunderbolt high flow cats
Custom shop made true dual 2.25 exhaust w/ X-pipe