I previously had a 2007 Cobalt LT Coupe. The car was ok but was missing power. I also hated the fact that the car came with hubcaps which made loud noises on every bump. I wanted an SS/SC but was unable to get one at a good price. So I decided to get a Cobalt SS and wow! Big difference from an LT. 17' chrome wheels, Pioneer sound system, interior is way better than my old LT. The 2.4L engine is so powerful, it reminds me of my old 94 Camaro V6. I did change the wing to the high rise one that comes standard on an SS/SC only because I think the wing makes my Cobalt SS stand out more.
The sound of the engine when you hit the throttle, exterior appearance makes car look very sporty, sound system, Chrome Wheels, sporty exhaust, remote start, interior is a vast improvement to the LS and LT models.
One gripe is that on star does not come standard on the SS models, or "Sport" models as they are called now. Also, no heated seats are available.